bannera

Book A.
Introduction

Book B.
7150 Requirements Guidance

Book C.
Topics

Tools,
References, & Terms

SPAN
(NASA Only)

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Lifecycle Review Entry/Exit Criteria Guidance

Entrance and Exit Criteria
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This section identifies criteria for the entrance into and the successful completion of one of the 13 lifecycle reviews from NPR 7123.1 Appendix G. It is organized by the 13 reviews chosen and includes the following information: entrance criteria, exit criteria, software community responsibilities (e.g., SDP/SMP), software community contributions to system activities/products (e.g., Project Plan).
Material was also added and adapted from these other sources:

  • NPR 7120.5D (NM 7120-81)
  • Center documents & PALs: ARC, JPL, GSFC, MSFC, SSC
  • Defense Acquisition Guidebook

Notes: The software requirements review (SwRR) is not included in 7123.1, but is often used in software projects, so it is included here. The following reviews were not included because they did not have any apparent correlation to 7150.2A: Program/System Requirements Review, Program/System Definition Review, Post-Launch Assessment Review, Critical Event Readiness Review, Post-Flight Assessment Review, Decommission Review, Periodic Technical Review. (Tables G-1,2,15-19)

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MissionConceptReview(MCR)">Mission Concept Review (MCR)

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  • Need for mission clearly identified
  • Mission goals and objectives clearly defined and stated; unambiguous and internally consistent
  • Analysis of alternative concepts (showing at least one feasible)
  • Concept of operations
  • Preliminary risk assessment, including technologies and associated risk management/mitigation strategies and options
  • Conceptual test and evaluation strategy
  • Preliminary technical plans to achieve next phase
  • Conceptual life-cycle
  • Preliminary Software Management Plan (SMP)
  • The preliminary set of requirements to meet the mission objectives
  • The mission is feasible
    • A solution has been identified that is technically feasible
    • A rough cost estimate is within an acceptable cost range
  • The cost and schedule estimates are credible
  • An updated technical search was done to identify existing assets or products that could satisfy the mission or parts of the mission

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  • Technical planning is sufficient to proceed to the next phase
  • Risk and mitigation strategies have been identified and are acceptable based on technical risk assessments
  • As applicable,
    • Science objectives are clearly understood and comprehensively defined
    • Preliminary mission requirements are traceable to science objectives
    • Operations concept clearly supports achievement of science objectives
  • Conceptual system design meets mission requirements, and the various system elements are compatible
  • Technology dependencies are understood, and alternative strategies for achievement of requirements are understood
  • Conceptual system design meets mission requirements, and the various system elements are compatible
  • Technology dependencies are understood, and alternative strategies for achievement of requirements are understood
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SystemsRequirementsReview(SRR)">Systems Requirements Review (SRR)

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  • Successful completion of the MCR and responses made to all MCR Requests for Actions (RFAs) and Review Item Discrepancies (RIDs)
  • A preliminary SRR agenda, success criteria, and charge to the board have been agreed to by the technical team, project manager, and review chair
  • Technical products made available to participants prior to SRR (noted in this list)
  • System requirements document
  • Preliminary system requirements allocation to next lower level system
  • System software functionality description
  • Updated concept of operations
  • Updated mission requirements, if applicable
  • Software inputs / contributions to
    • Baselined Systems Engineering Management Plan (SEMP)
    • Preliminary Project Plan
    • System safety and mission assurance plan
    • Risk management plan
      • Updated risk assessment and mitigations (including Probabilistic Risk Assessment (PRA) as applicable)
    • Technology Development Maturity Assessment Plan
    • Logistics documentation (e.g., preliminary maintenance plan)
    • Preliminary human rating plan, if applicable
    • Initial document tree
  • Lessons Learned
    • Review of existing Lessons Learned from previous projects
    • Lessons Learned captured from software areas of the project; indicate the problem or success that generated the Lesson Learned, what the Lesson Learned was, and its applicability to future projects
    • Confirmation that Lessons Learned added to Lessons Learned database


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  • Process for allocation and control of requirements throughout all levels deemed sound; plan defined to complete the definition activity within schedule constraints
  • Requirements definition is complete with respect to top-level mission and science requirements; interfaces with external entities and between major internal elements have been defined
  • Requirements allocation and flow down of key driving requirements defined down to subsystems
  • Preliminary allocation of system requirements to hardware, human, and software subsystems
  • Preliminary approaches determined for how requirements will be verified and validated down to the subsystem level
  • Major risks identified and technically assessed, and viable mitigation strategies defined
  • Requirements and selected concept will satisfy the mission
  • System requirements, approved material solution, available product/process technology, and program resources form a satisfactory basis for proceeding into the development phase
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SoftwareRequirementsReview(SwRR)">Software Requirements Review (SwRR)

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  • Successful completion of the SRR and responses made to all SRR Requests for Actions (RFAs) and Review Item Discrepancies (RIDs)
  • A preliminary SwRR agenda, success criteria, and charge to the board have been agreed to by the technical team, project manager, and review chair
  • Technical products made available to participants prior to SwRR (noted in this list)
  • Updated concept of operations
  • Preliminary system requirements allocation to software
  • Software requirements (SRS)
    • Complete, consistent, feasible, testable, and traceable
    • Identify test, delivery and quality requirements, and are understandable
  • Functional requirements
    • High-level requirements for each functional area
    • Block diagram of the major software components in each functional area, their interfaces and data flows
    • Definition of relevant operational modes (e.g., nominal, critical, contingency)
    • Critical and/or controversial requirements, including safety-critical requirements, open issues, and areas of concern
    • Requirements needing clarification or additional information
  • Traceability Matrix (bidirectional)
    • Requirements to higher-level requirements
    • Requirements to build and system level tests
  • Performance requirements
    • Performance requirements for the software
    • Critical timing relationships and constraints
  • Software Interface Specifications (SISs - requirements portion)
  • Software requirements and interface requirements have been analyzed and specified
  • Computer resource estimates and margins (memory, bus, throughput)
  • Software Quality Assurance Plan (SQAP)
  • Software QA organization structured with independent reporting relationship outside development group
  • Updated PHA/Software Assurance Classification Report (SACR), Software Safety Litmus Test
  • Review for technical and economic feasibility completed for allocation of functions at the (sub)system level to hardware, firmware, and software
  • Design Constraints
  • Design strategy
    • Explanation of design drivers and design decisions that have been made, including software architecture, operating systems, reuse of existing software, and selection of COTS components
    • Resource goals and preliminary sizing estimates (incl. timing and database storage) in the context of available hardware allocations; strategies for measuring and tracking resource utilization
    • Initial Build Plan
  • Risk management plan
    • Risks that may impact cost, schedule and technical goals completed
  • Configuration Management Plan addressing:
    • Configuration identification, change control, status accounting, and configuration audits
  • SDP / SMP updated for corresponding architectural design and test development activities
    • Personnel identified (quantity, names, assignment duration, required skills)
    • Organizational responsibilities and interfaces
    • All computer programs identified, their development schedules compatible, their dependencies evident in schedules, and supporting resource allocations made
    • Updated cost estimate
    • Milestones are verifiable and achievable
    • Schedules for development of all computer programs, and procedures for monitoring and reporting their status
    • Processes and metrics for program success
    • Management methods and controls for design & development
    • Programming languages, security requirements, operational and support concepts identified
    • Preliminary high level software architecture
  • Qualification requirements
    • Overall software test strategy, including the test levels (unit, integration, build, and system-level testing), test types (interface, load/stress, regression), and test tools
    • Software development and test environments, including processors, operating systems, communications equipment, simulators and their fidelity
    • Test facilities, needs and capabilities
    • Methodology for verifying the system requirements and acceptance criteria
    • Test tool requirements and development plans
  • Preliminary software V&V plan
  • Peer reviews completed: SMP, s/w requirements, V&V plans, preliminary s/w system architectural design (if identified for peer review/inspection in s/w development plans)
  • Make-buy decisions supported by analysis
  • Analyses completed, as applicable:
    • Functional analyses
    • Testability
    • Operability
    • Failure modes and effects analyses
    • Reliability engineering
    • Systems safety and hazards
    • Life-cycle costs
    • Security
  • Trade-off and design decisions completed and reviewed, as applicable, for:
    • Inherited capabilities
    • New technologies
    • Programming language selection
    • Sizing and timing budget
    • Design methods and tool selection
    • Programming standards and conventions
    • Database conceptual design
  • Software User's Guide/Operator's Manual (UG/SOM - user's guide portion)

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  • Software requirements determined to be clear, complete, consistent, feasible, traceable, testable
  • SMP, software requirements, interface requirements, V&V plans are adequate and feasible basis for architectural design activities and are approved, baselined and placed under configuration management
  • Requirements and performance requirements defined, testable, and consistent with cost, schedule, risk, technology readiness, and other constraints
  • System requirements, approved material solution, available product/process technology, and program resources form a satisfactory basis for proceeding into the development phase
  • All SwRR RIDs and actions are documented with resolution plans and authorization received to proceed to software architecture design
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MissionDefinitionReview(MDR)">Mission Definition Review (MDR)

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  • Successful completion of the previous review (typically SRR) and responses made to all Requests for Actions (RFAs) and Review Item Discrepancies (RIDs)
  • Preliminary agenda, success criteria, and charge to the board have been agreed to by the technical team, project manager, and review chair
  • Technical products made available to participants prior to SDR (noted in this list)
  • System architecture, including software
  • Preferred software solution definition including major tradeoffs and options
  • Updated baselined documentation, as required
  • Preliminary functional baseline (with supporting trade-off analyses and data)
  • Preliminary system software functional requirements
  • Updated risk management plan (could be part of SDP/SMP)
    • Updated software risk assessment and mitigations (including Probabilistic Risk Assessment (PRA), as applicable)
  • Updated SDP/SMP
    • Updated technology development, maturity, and assessment plan
    • Updated cost and schedule data
    • Work Breakdown Structure
  • Updated logistics documentation
  • Software verification and validation plan
  • Software requirements document(s)
  • Interface requirements documents (including software)
  • Technical resource utilization estimates and margins
  • Updated preliminary software safety analysis
  • Project Software Data Dictionary
  • Project Software Configuration Management Plan
  • Project Software Assurance Plan
  • Project Software Maintenance Plan
  • Software inputs / contributions to
    • Systems Engineering Management Plan (SEMP) changes, if any
    • Based on system complexity, updated human rating plan
    • Flow down of system requirements to all software functional elements of the system

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  • Software requirements, including mission success criteria and any sponsor-imposed constraints, are defined and form the basis for the proposed conceptual design
  • All software technical requirements are allocated and the flow down to subsystems is adequate; requirements, design approaches, and conceptual design will fulfill the mission needs consistent with the available resources (cost, schedule, throughput, and sizing)
  • Requirements process is sound and can reasonably be expected to continue to identify and flow detailed requirements in a manner timely for development
  • Technical approach is credible and responsive to the identified requirements
  • Technical plans have been updated, as necessary
  • Tradeoffs are completed, and those planned for Phase B adequately address the option space
  • Significant development, mission, and safety risks are identified and technically assessed, and a process and resources exist to manage the risks
  • Adequate planning exists for the development of any enabling new technology
  • Operations concept is consistent with proposed design concept(s) and in alignment with the mission requirements
  • All allocated requirements are verifiable and traceable to their corresponding system level requirement
  • Preliminary verification approaches are agreed upon
  • Requisite level of detail and resources are available to support the acquisition and development plan within existing constraints
  • A software system is defined which satisfies all of the system requirements assigned to software
  • All of these software system requirements are traceable to either mission objectives, concept of operations, or interface requirements
  • Monitoring processes/practices are in place to create software system within planned technical, schedule, cost, effort, and quality capabilities
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SystemDefinitionReview(SDR)">System Definition Review (SDR)

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  • Successful completion of the previous review (typically SRR) and responses made to all Requests for Actions (RFAs) and Review Item Discrepancies (RIDs)
  • Preliminary agenda, success criteria, and charge to the board have been agreed to by the technical team, project manager, and review chair
  • Technical products made available to participants prior to SDR (noted in this list)
  • System architecture, including software
  • Preferred software solution definition including major tradeoffs and options
  • Updated baselined documentation, as required
  • Preliminary functional baseline (with supporting trade-off analyses and data)
  • Preliminary system software functional requirements
  • Updated risk management plan (could be part of SDP/SMP)
    • Updated software risk assessment and mitigations (including Probabilistic Risk Assessment (PRA), as applicable)
  • Updated SDP/SMP
    • Updated technology development, maturity, and assessment plan
    • Updated cost and schedule data
    • Work Breakdown Structure
  • Updated logistics documentation
  • Software verification and validation plan
  • Software requirements document(s)
  • Interface requirements documents (including software)
  • Technical resource utilization estimates and margins
  • Updated preliminary software safety analysis
  • Project Software Data Dictionary
  • Project Software Configuration Management Plan
  • Project Software Assurance Plan
  • Project Software Maintenance Plan
  • Software inputs / contributions to
    • Systems Engineering Management Plan (SEMP) changes, if any
    • Based on system complexity, updated human rating plan
    • Flow down of system requirements to all software functional elements of the system
  • Software requirements, including mission success criteria and any sponsor-imposed constraints, are defined and form the basis for the proposed conceptual design
  • All software technical requirements are allocated and the flow down to subsystems is adequate; requirements, design approaches, and conceptual design will fulfill the mission needs consistent with the available resources (cost, schedule, throughput, and sizing)
  • Requirements process is sound and can reasonably be expected to continue to identify and flow detailed requirements in a manner timely for development
  • Technical approach is credible and responsive to the identified requirements


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  • Software requirements, including mission success criteria and any sponsor-imposed constraints, are defined and form the basis for the proposed conceptual design
  • All software technical requirements are allocated and the flow down to subsystems is adequate; requirements, design approaches, and conceptual design will fulfill the mission needs consistent with the available resources (cost, schedule, throughput, and sizing)
  • Requirements process is sound and can reasonably be expected to continue to identify and flow detailed requirements in a manner timely for development
  • Technical approach is credible and responsive to the identified requirements
  • Technical plans have been updated, as necessary
  • Tradeoffs are completed, and those planned for Phase B adequately address the option space
  • Significant development, mission, and safety risks are identified and technically assessed, and a process and resources exist to manage the risks
  • Adequate planning exists for the development of any enabling new technology
  • Operations concept is consistent with proposed design concept(s) and in alignment with the mission requirements
  • All allocated requirements are verifiable and traceable to their corresponding system level requirement
  • Preliminary verification approaches are agreed upon
  • Requisite level of detail and resources are available to support the acquisition and development plan within existing constraints
  • A software system is defined which satisfies all of the system requirements assigned to software
  • All of these software system requirements are traceable to either mission objectives, concept of operations, or interface requirements
  • Monitoring processes/practices are in place to create software system within planned technical, schedule, cost, effort, and quality capabilities
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PreliminaryDesignReview(PDR)">Preliminary Design Review (PDR)

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  • Successful completion of the SDR or MDR and responses made to all SDR or MDR Requests for Actions (RFAs) and Review Item Discrepancies (RIDs), or a timely closure plan exists for those remaining open
  • Preliminary agenda, success criteria, and charge to the board have been agreed to by the technical team, project manager, and review chair
  • Technical products made available to participants prior to PDR (noted in this list)
  • Updated baselined documentation, as required
  • Updated technology development maturity assessment plan
  • Updated risk assessment and mitigation
  • Updated cost and schedule data
  • Updated logistics documentation, as required
  • Applicable technical plans (e.g., technical performance measurement plan, payload-to-carrier integration plan, producibility / manufacturability program plan, reliability program plan, quality assurance plan)
  • Applicable standards
  • Interface control documents
  • Software V&V Plan
  • Technical resource utilization estimates and margins
    • Storage or memory resource allocations developed allocating those resources to each software segment in the architecture
  • Updated SDP/SMP
    • Work Breakdown Structure
  • Preliminary Traceability Matrix to CSCI level, including V&V trace
    • safety-critical requirements highlighted
    • Requirements allocated to components of the architecture (to CSCI level)
  • SDD and Traceability Matrix review by test team completed and SDD updated as needed
  • SMP updated for the corresponding detailed design activities
  • Software inputs or contributions to the updated Project Plan
  • Supplier documentation
    • Software Data Dictionary(s)
    • Software Classification(s)
    • Software Development or Management Plan(s) [with V&V separate]
    • Software Configuration Management Plan(s)
    • Software Assurance Plan(s)
    • Software Maintenance Plan(s)
  • Revised SRS
    • Software requirements to CSCI level
    • Subsystem and lower-level technical requirements
    • Requirements for reuse of existing software, reuse analysis
    • Performance requirements, including memory, bus, CPU requirements
    • Quality requirements, e.g., reliability, usability, or maintainability requirements
    • Safety requirements
    • Security requirements
    • Derived requirements
  • Revised Operational Concepts, as applicable
    • Normal operations scenarios
    • Fault detection, isolation and recovery (FDIR) strategy
    • Hazard reduction strategies
  • Lessons Learned
    • Review of existing Lessons Learned from previous projects
    • Lessons Learned captured from software areas of the project; indicate the problem or success that generated the Lesson Learned, what the Lesson Learned was, and its applicability to future projects
    • Confirmation that Lessons Learned added to Lessons Learned database
  • Trade studies
    • Addressing COTS, reuse, etc.
    • Trade-off analysis and data supporting design, as required
    • Documented Alternative Design Solutions and Selection Criteria
  • Documented Solutions, Analysis, Decision, and Rationale
    • Inherited capabilities identified and compatible with the designs
  • Preliminary Software Design Document (SDD)
  • Subsystem design specifications for each configuration item (h/w and s/w)
  • Completed definition of the software architecture and preliminary database design description, as applicable
    • External interfaces and end-to-end data flow
    • Design drivers (e.g., performance, reliability, usability, hardware considerations)
    • Overview of software architecture, including context diagram
    • List of subsystems, tasks, or major components – e.g., user interface, database, task management
    • Functional allocations, descriptions of major modules, and internal interfaces
    • Safety considerations in the design elements and interfaces
    • Design verification approach, e.g., prototyping, inspection, peer review
    • Architectural design verified via operational scenarios to include required functionality, operating modes, and states
  • Safety analyses and plans
    • Matrix showing each subsystem/task/component's software classification (per NPR 7150.2A), its safety classification (per NASA-STD-8719.13B), the rationale for the classifications, and the status of the classifications' approval by Software Assurance and management
    • Updated PHA, Software Safety Litmus Test, if necessary
    • Approved SMP/ PHA/Software Assurance Classification Report (SACR)
  • Analyses completed:
    • Partitioning analysis (modularity)
    • Executive control and Start/Recovery
    • Control and Data flow analysis
    • Operability
    • Failure modes and effects analyses
  • Results of prototyping factored into architectural design
  • Prototype software, if necessary
  • Critical components identified and trial coding scheduled
  • Human engineering aspects of design addressed with solutions acceptable to potential users
  • Developmental tools and facility requirements identified and plans made and actions taken to ensure their availability when needed
  • Test tools and facility requirements identified with plans and actions to ensure their availability when needed
  • Test group involved in requirements and design analysis
  • Security and supportability requirements factored into the design
  • Metrics established and gathered to measure software development progress
  • Procedures and tools developed for mechanizing management and configuration management plans
  • Configuration Control Board established for software (and change control procedures working)
  • Configuration management system understood by those who must use it
  • Library established for storing, controlling and distributing software products; library procedures understood and working
  • Independent software quality assurance group formed and contributing as a team member to the design and test activities
  • Interdisciplinary teams working design issues that cross (sub)system component boundaries (software, hardware, etc.)
  • Peer reviews completed: SRS , software architectural design (if identified for s/w peer review/inspection in s/w development plans), integration test plans
  • Status of change requests

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  • Top-level requirements including mission success criteria, Technical Performance Measures (TPMs), and any sponsor-imposed constraints are agreed upon, finalized, stated clearly, and consistent with preliminary design
  • Flow down of verifiable requirements is complete and proper or, if not, an adequate plan exists for timely resolution of open items; requirements are traceable to mission goals and objectives
    • All supplier software requirements are verifiable
  • Preliminary design is expected to meet the functional and performance requirements at an acceptable level of risk
  • Definition of technical interfaces is consistent with overall technical maturity and provides an acceptable level of risk
  • Adequate technical interfaces are consistent with the overall technical maturity and provide an acceptable level of risk
  • Adequate technical margins exist with respect to TPMs
  • Any required new technology has been developed to an adequate state of readiness, or back-up options exist and are supported to make them a viable alternative
  • Project risks are understood and credibly assessed; plans, process, and resources exist to effectively manage them
  • Operational concept is technically sound, includes (where appropriate) human factors, and includes flow down of requirements for its execution
  • All RIDs/actions are completed and customer approval to proceed to detailed design phase
  • Proposed design approach has sufficient maturity to proceed to final design
    • Subsystem requirements, subsystem preliminary design, results of peer reviews, and plans for development, testing and evaluation form a satisfactory basis for proceeding into detailed design and test procedure development
  • SMP, the software architectural design, and integration test plans adequate and feasible to support software detailed design
  • Products (listed above) are approved, baselined and placed under configuration management
  • Software inputs / contributions to
    • Safety and mission assurance (e.g., safety, reliability, maintainability, quality, and EEE parts) adequately addressed in preliminary designs and any applicable S&MA products (e.g., Probabilistic Risk Assessment (PRA), system safety analysis, and failure modes and effects analysis) have been approved
    • Management processes used by the mission team are sufficient to develop and operate the mission
    • Cost estimates and schedules indicate that the mission will be ready to launch and operate on time and within budget, and that the control processes are adequate to ensure remaining within allocated resources
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CriticalDesignReview(CDR)">Critical Design Review (CDR)

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  • Successful completion of the previous review (typically PDR) and responses made to all Requests for Actions (RFAs) and Review Item Discrepancies (RIDs), or a timely closure plan exists for those remaining open
  • Preliminary agenda, success criteria, and charge to the board have been agreed to by technical team, project manager, and review chair
  • Technical products made available to participants prior to CDR (noted in this list)
  • Updated baselined documents, as required
  • Technical data package (e.g., integrated schematics, Spares provisioning list, interface control documents, engineering analyses, and specifications)
  • Updated Technology Development Maturity Assessment Plan
  • SMP updated for implementation and unit test activities
    • Updated Work Breakdown Structure
    • Updated cost and schedule data
  • Progress against software management plans
  • Plan for milestone and peer reviews, walkthroughs, and external reviews
  • Documentation plan, including each document's status and when it will be baselined
  • Software requirements, management process, including documents used and produced, and V&V plan are baselined
  • Preliminary NPR 7150.2 compliance matrix
  • Design process, including methodology and standards used, design documentation produced, inspections and reviews
  • Implementation process, incl. standards, review process, problem reporting, unit test, integration
  • Management procedures and tools for measuring and reporting progress available and working
  • Software measurements on planned and actual regarding product size, cost, schedule, effort, and defect
  • Procedures established and working for software quality assurance and quality an integral part of the product being produced
  • Updated logistics documentation
  • Staffing-up problems being addressed and contingency plans in place
  • IT Security Requirements (Mission-specific)
  • Software design document(s) (including interface design documents, detailed design and unit test)
  • Command and telemetry list
  • Final Design Solution, Evaluation, and Rationale
    • Documented Make, Buy, and/or Reuse, Analysis, Criteria, and Rationale
    • Reused/heritage software or functionality from previous projects; necessary modifications
  • Final Architecture Definition
  • System design diagram (e.g., Level 0 data flow diagram or UML)
    • For each task in the system design diagram
    • Design diagrams for the task
    • Description of functionality and operational modes
    • Safety considerations addressed in the design
    • Resource and utilization constraints (e.g., CPU, memory); how the software will adapt to changing margin constraints; performance estimates
    • Data storage concepts and structures
  • Data flow diagrams
  • Identification and formats of input and output data
  • Interrupts and/or exception handling, including event, FDC, and error messages
  • IT Security features (design features)
  • Detailed description of software operation and flow
  • Operational limits and constraints
  • Technical resource utilization estimates and margins
    • Detailed timing and storage allocation compiled
  • Analyses completed:
    • Algorithm accuracy
    • Critical timing and sequence control
    • Dimensional analysis (such as consistency of array dimensions)
    • Singularity Analysis (such as division by zero)
    • Undesired event handling
    • Operability
    • Failure modes and effects analyses
  • Final status and results of analyses
  • Algorithms sufficient to satisfy their requirements
  • Failure detection and correction (FDC) requirements, approach, and detailed design
  • Subsystem/component context diagram
  • Trial code analyzed and designs modified accordingly
  • Supplier documentation
    • Software Design Description(s)
    • Interface Design Description(s)
    • Updated Supplier Software Verification and Validation Plan(s)
    • Preliminary Supplier Software Test Procedure(s)
  • Peer reviews for software and rework accomplished, as defined in the s/w and/or project plans
  • Designs comprising the software completed, peer reviewed and placed under change control
  • SRS to Computer Software Unit (CSU) level
  • Updated Traceability Matrix (to CSU level)
  • Verification that detailed designs cover the requirements
  • Product Assurance and Software Safety plans and activities
  • System safety analysis with associated verifications
  • Updated HA / Software Assurance Classification Report (SACR), if necessary
  • Subsystem-level and preliminary operations safety analyses
  • Updated risk assessment and mitigation
  • Updated reliability analyses and assessments
  • Independent verification and validation (IV&V) plans and status
  • Systems and subsystem certification plans and requirements (as needed)
  • Configuration Management (CM) processes, including discrepancy reporting and tracking (development and post-release)
  • Development environment (e.g., h/w diagram, operating system(s), compilers, DBMS, tools)
  • If relevant, new compiler validated and producing acceptable object code for the target machine
  • Tools needed for software implementation completed, qualified, installed and accepted, and team trained in their use
  • Facilities for software implementation in place, operating, ready for use
  • Build plan
  • Product build-to specifications for each hardware and software configuration item, along with supporting trade-off analyses and data
  • Coding, integration, and test plans and procedures
  • V&V plan (including requirements and specification)
  • Test team roles, functions, support required are defined
  • Software Test Plan (integration and test procedure outlines)
  • Test procedures
  • Test levels (e.g., unit testing, integration testing, system testing) – description, who executes, test environment, standards followed, verification methodologies
  • Testing preparation and execution activities, incl. testing of reused/heritage software, if applicable
  • Build test timeline and ordered list of components and requirements to be tested in each build
  • Test environments for each test level --diagram and description of tools, testbeds, facilities
  • Test group trained prepared to evaluate the code using their facilities and tools
  • Software for testing / activation
  • Software requirement verification recording, monitoring, and current status – databases and test reports; sample test verification matrix
  • System and acceptance testing – operational scenarios to be tested, including stress tests and recovery testing, if applicable
  • Acceptance process – reviews (e.g., Acceptance Test Readiness Review, Acceptance Test Review), approval, and signoff processes
  • Acceptance criteria
  • Delivery, Installation, Maintenance
    • Disposition of source code and tools, handling of load images, installation of databases, etc.
    • Version identification and documentation
    • Maintenance plan, if applicable, including disposition of COTS components (source code, licenses, etc.)
    • Close-out and archive of software products
  • Launch site operations plan
  • Checkout and activation plan
  • Disposal plan (including decommissioning or termination)
  • Preliminary Operations Handbook
  • Revised Draft of Programmer's Manual
  • Draft of User's Manual
  • Lessons Learned
    • Review of existing Lessons Learned from previous projects
    • Lessons Learned captured from software areas of the project; indicate the problem or success that generated the Lesson Learned, what the Lesson Learned was, and its applicability to future projects
    • Confirmation that Lessons Learned added to Lessons Learned database
  • Status of change requests
  • Software inputs / contributions to updated Project Plan

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  • All supplier software requirements have been mapped to the software design
  • All elements of the design are compliant with functional and performance requirements
    • Detailed design is expected to meet requirements with adequate margins at acceptable level of risk
  • Interface control documents are sufficiently matured to proceed with fabrication, assembly, integration, and test, and plans are in place to manage any open items
  • High confidence exists in the product baseline, and adequate documentation exists or will exist in a timely manner to allow proceeding with coding, integration, and test
  • Product verification and product validation requirements and plans are complete
  • Verification approach is viable, and will confirm compliance with all requirements
  • Testing approach is comprehensive, and planning for system assembly, integration, test, and launch site and mission operations is sufficient to progress into next phase
  • Adequate technical and programmatic margins and resources exist to complete development within budget, schedule, and risk constraints
  • Risks to mission success are understood and credibly assessed, and plans and resources exist to effectively manage them
  • Software inputs / contributions to
    • Safety and mission assurance (e.g., safety, reliability, maintainability, quality, and EEE parts) have been adequately addressed in system and operational designs, and any applicable S&MA products (e.g., Probabilistic Risk Assessment (PRA), system safety analysis and failure modes and effects analysis) have been approved
  • Management processes used by the project team are sufficient to develop and operate the mission
  • High priority RIDs against the SDD are closed/actions are completed and customer approval to proceed to next phase
  • Approved readiness to proceed with software implementation and test activities
  • SMP, software detailed designs, and unit test plans are an adequate and feasible basis for the implementation and test activities
  • Products (listed above) are approved, baselined, and placed under configuration management
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ProductionReadinessReview(PRR)">Production Readiness Review (PRR)

A PRR is held for FS&GS projects developing or acquiring multiple or similar systems greater than three or as determined by the project. The PRR determines the readiness of the system developers to efficiently produce the required number of systems. It ensures that the production plans; fabrication, assembly, and integration enabling products; and personnel are in place and ready to begin production. – NPR 7123.1

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  • Significant production engineering problems encountered during development are resolved
  • Design documentation adequate to support production
  • Production plans and preparation adequate to begin fabrication
  • Production-enabling products and adequate resources available, allocated, and ready to support end product production
  • Production plans
  • Production risks and mitigations
  • Schedule

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  • System requirements fully met in final production configuration
  • Adequate measures in place to support production
  • Design-for-manufacturing considerations ensure ease and efficiency of production and assembly
  • Risks identified, credibly assessed, and characterized, and mitigation efforts defined
  • Delivery schedules verified
  • Alternate sources for resources identified, as appropriate
  • Required facilities and tools are sufficient for end product production
  • Specified special tools and test equipment are available in proper quantities
  • Production and support staff are qualified
  • Production engineering and planning are sufficiently mature for cost-effective production
  • Production processes and methods are consistent with quality requirements
  • Qualified suppliers are available for materials that are to be procured
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SystemIntegrationReview(SIR)">System Integration Review (SIR)

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  • Integration plans and procedures completed and approved
  • Segments and/or components available for integration
  • Mechanical and electrical interfaces verified against the interface control documentation
  • All applicable functional, unit-level, subsystem, and qualification testing conducted successfully
  • Integration facilities, including clean rooms, ground support equipment, electrical test equipment, and simulators ready and available
  • Support personnel adequately trained
  • Handling and safety requirements documented
  • All known system discrepancies identified and disposed in accordance with agreed-upon plan
  • All previous design review success criteria and key issues satisfied in accordance with agreed-upon plan
  • Quality control organization ready to support integration effort
  • V&V plans, test plans

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  • Adequate integration plans and procedures are completed and approved for the system to be integrated
  • Previous component, subsystem, and system test results form a satisfactory basis for proceeding to integration
  • Risk level is identified and accepted by program/project leadership, as required
  • Integration procedures and work flow have been clearly defined and documented
  • Review of integration plans, as well as procedures, environment, and configuration of items to be integrated, provides a reasonable expectation that integration will proceed successfully
  • Integration personnel have received appropriate training in integration and safety procedures
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TestReadinessReview(TRR)">Test Readiness Review (TRR)

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  • Objectives of testing clearly defined and documented, and test plans, procedures, environment, and configuration of test item(s) support those objectives
  • Configuration of system under test defined and agreed to; all interfaces placed under configuration management or defined in accordance with an agreed-to plan, and version description document available to TRR participants
  • Applicable functional, unit-level, subsystem, system, and qualification testing conducted successfully; results available
  • All TRR-specific materials, such as test plans, test cases, and procedures, available to all participants prior to TRR
  • Updated and current baselined documentation (from previous reviews - SRR, PDR, CDR
  • Updated requirements and design documentation
  • Required documents in the state/status required Deviations? Waivers?
  • All known system discrepancies identified and disposed in accordance with agreed-upon plan
  • All previous design review success criteria and key issues satisfied in accordance with agreed-upon plan
  • All required test resources people (including a designated test director), facilities, test articles, test instrumentation, and other test enabling products identified and available to support required tests
  • Facilities and tools for integration and test ready, qualified, validated, and available for operational use including test engineering products (test cases, procedures, tools, etc.), test beds, simulators, and models
  • Roles and responsibilities of all test participants defined and agreed to
  • Test contingency planning accomplished, and all personnel trained
  • Supplier Software Version Description(s)
  • Software Build from CM
  • Operational software ready for testing
  • Informal Dry Run completed without errors
  • Outstanding Software Change Requests (SCRs) ready for review
  • Updated Traceability Matrix
  • All requirements included in test procedure document and uniquely identified and traceable in the SRTM
  • Requirements Analysis and Traceability Reports (with possible RIDs)
  • Code Analysis and Assessment Results (including SCRs, RIDs, etc.)
  • Metric Data and Reports (implementation and test)
  • Description of System Test Approach
  • Test plan includes safety critical test scenarios
  • Test plan includes test scenarios for all software/system requirements defined in the SRTM, tests that check the performance at the limits of ranges specified for the requirements and operational scenarios; includes test limitations and/or constraints
  • Validation of operations and users manuals
  • Test case structure established that identifies for each test:
    • Software requirements to be tested
    • Required inputs
    • Facilities and test tools required
    • Expected outputs and analysis methods
    • Software entities to be exercised by the test
  • Configuration for system testing
  • Summary of Quality Assurance (QA) activities used during development
  • Successful audit of the VDD (such as FSW) including fixes
  • Any current risks, issues, or requests for action (RFAs) that require follow-up and how they will be tracked to closure
  • Results of Testing completed to date
    • Objectives of tests
    • Confirm all steps in the test runs are documented
    • Results and Safety Critical Test results
    • Tests performed
    • Successful Tests
    • Known problems
    • Deviations
    • Waivers
    • Issues
  • Software Test Process
    • Build and System Test Methodology
    • Electrostatic Discharge considerations
    • Safety critical software verification considerations
    • Software test standards (including use of CM)
    • CM process and Procedures used for testing and how each was verified prior to usage
    • Process for capturing test data and storing it in the CM system
    • Test procedure red-line process
    • If/how a test can be resumed if error found during testing
    • Discrepancy Reporting System
    • Process for tracking Test Progress
    • Role of Quality Assurance including redlining and QA witnessing role and responsibilities
    • Any safety and security issues relevant to the testing activity
    • All workarounds and non-functioning software components
    • Time required for testing; include schedule and analysis of time needed on various environments / testbeds / Spacecraft
  • List of all Requirements Documents relevant to Acceptance testing
  • Acceptance Test Readiness
    • Process for analysis of Test Results including the division of responsibility
    • Acceptance Test testbed (environment) setup (hardware)
    • Setup and use of Simulators or other Test tools and their required qualifications
    • Limitations of the testbed (environment)
    • Tests that require hardware for verification
    • Description, at a high level, of what each test does, how long it lasts, and any special circumstances
    • IV&V report/status - if applicable
    • Preparedness for Acceptance Testing
    • Requests For Action (RFAs)
    • Decision to proceed to Acceptance Testing
  • SMP updated for integration and test activities
  • Updated software cost estimate, and software related expenditures collection and report by life cycle phases
  • Test Schedule
    • Current system test status
    • Plans for Acceptance Test
    • Acceptance Test acceptance criteria
    • Issues and Concerns
    • Test Schedule
  • Schedules for integration and test established and are reasonable based on results of unit testing
  • Tests reusable for regression testing
  • Expected results
  • Completed evaluations (in conjunction with unit testing):
    • Verification of computations using nominal data
    • Verification of computations using stress data
    • Verification of output options and formats
    • Exercise of executable statements in units at least once
    • Test of options at branch points
    • Verification of standards compliance
  • Completed evaluations (in conjunction with s/w integration and test):
    • Verification of performance throughout anticipated range of operation conditions including nominal, abnormal, failure and degraded mode situations
    • Verification of performance throughout anticipated range of operating conditions as various strings of units are linked together and various modes are exercised
    • Verification of end-to-end functional flows and database linkages
    • Exercise of logic switching and executive control options at least once
  • Risk analysis and risk list updated and associated risk management plan prepared
  • Databases for integration and test been created and validated
  • Test network showing interdependencies among test events and planned time deviations for these activities prepared
  • Lessons Learned
    • Plans to capture any lessons learned from test program are documented
    • Review of existing Lessons Learned from previous projects
    • Lessons Learned captured from software areas of the project; indicate the problem or success that generated the Lesson Learned, what the Lesson Learned was, and its applicability to future projects

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  • User-defined scenarios developed to test interactive or operator-oriented software
  • Peer reviews completed for implementation and tests to be performed, as defined in the software and/or project plans
  • Adequate test plans are completed and approved to proceed for the system under test
  • Adequate identification and coordination of required test resources are completed
  • Previous component, subsystem, and system test results form a satisfactory basis for proceeding into planned tests
  • Risk level is identified and accepted by program/competency leadership as required
  • Objectives of testing have been clearly defined and documented, and review of all test plans, as well as procedures, environment, and configuration of test item, provide a reasonable expectation that objectives will be met
  • Test cases have been reviewed and analyzed for expected results, and results are consistent with test plans and objectives
  • Test personnel have received appropriate training in test operation and safety procedures
  • Provisions have been made should test levels or system response exceed established limits or if the system exceeds its expected range of response
  • Software is ready to be tested
  • Formal dry test run completed
  • SMP, software implementations, and test are an adequate and feasible basis for integration and test activities
  • Products (listed above) are approved, baselined and placed under configuration management
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SystemAcceptanceReview(SAR)">System Acceptance Review (SAR)

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  • A preliminary agenda coordinated (nominally) prior to SAR
  • Technical products made available to participants prior to SAR (noted in this list)
  • Results of the SARs conducted at the major suppliers
  • Transition to production and/or manufacturing plan
  • Product verification results / test reports
  • Product validation results
  • Documentation that the delivered system complies with the established acceptance criteria
  • Documentation that the system will perform properly in the expected operational environment
  • Technical data package updated to include all test results
  • Certification package
  • Updated risk assessment and mitigation
  • Successfully completed previous milestone reviews
  • Remaining liens or unclosed actions and plans for closure
  • Baselined Software Build
  • Metrics Data and Reports
  • Software presentation prepared for AR
    • Software overview
    • Project System Diagram
    • Functional software overview
    • Software products/artifacts
    • Software traceability matrix examples
    • STPr/SVVPr status
    • Open RIDs
    • Open SCRs
    • Software summary and recommendations
  • Lessons Learned
    • Review of existing Lessons Learned from previous projects
    • Lessons Learned captured from software areas of the project; indicate the problem or success that generated the Lesson Learned, what the Lesson Learned was, and its applicability to future projects
    • Confirmation that Lessons Learned added to Lessons Learned database

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  • Required tests and analyses are complete and indicate that system will perform properly in expected operational environment
  • Risks are known and manageable
  • Software system meets established acceptance criteria
  • Required safe shipping, handling, checkout, and operational plans and procedures are complete and ready for use
  • Technical data package is complete and reflects delivered system
  • All applicable lessons learned for organizational improvement and system operations are captured
  • Software system has sufficient technical maturity to authorize shipment to designated operational facility or launch site
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OperationalReadinessReview(ORR)">Operational Readiness Review (ORR)

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  • All validation testing completed
  • Test failures and anomalies from validation testing resolved and results incorporated into all supporting and enabling operational products
  • All operational supporting and enabling products (e.g., facilities, equipment, documents, updated databases) that are necessary for the nominal and contingency operations have been tested and delivered/installed at the site(s) necessary to support operations
  • Software user's manual completed
  • Operations manual complete
  • Software inputs / contributions to
    • Training provided to users and operators on correct operational procedures for system
    • Ground Systems Readiness
      • Diagram describing main functionality for project, how parts interact, and main flow of data between major functional parts
      • Problem Reporting and Change Request process for Discrepancy Reports (DR), Enhancement Reports (ER), Database Change Requests (DCR)
      • Current DR, ER, DCR status, include historical trend data, and details on current open DRs, ERs, DCRs
      • Key parts of system, their current Operational Readiness, and how verified; any issues, how they will be handled, and workarounds available including when permanent fixes will be completed
      • Key interactions with other systems, their Operational Readiness, and how verified; any issues, how they will be handled, and workarounds available including when permanent fixes will be completed
      • Software freeze plan (when software is frozen for launch, what types of fixes will be approved for implementation under a freeze, etc.) and how CCB will handle software changes or bug fixes close to launch
    • Mission Operations Center Readiness
      • MOC software readiness for all systems and how verified; any issues, how they will be handled, and workarounds available including when permanent fixes will be completed
      • Testing that was done, results, criticality of problems encountered, how problems will be resolved, and schedule for correction/verification of any fix
      • Current status of procedures that will be used by the MOC; how tested, results, and schedule for correction/verification of any fix
  • Flight Software Maintenance Process Planned
    • Outstanding items that need to be completed before readiness is achieved along with scheduled date
    • Confirmation that flight software table loads and code patch testing successfully completed on all processors, including all possible on-board media (e.g., RAM, EEPROM)
  • Science Planning and Processing System Readiness, as applicable
    • Diagram describing Science Data Processing products and general timelines involved
    • Diagram describing Science System Context (relationship of main Mission Operations Center, Mission Planning Office, Science Validation Facility, Ground stations, interconnecting networks, and the main science data Instrument teams)
    • Description of these main components in high-level detail including planning and processing functions; include any special cases for launch, in-orbit checkout, end of mission, etc.; description of testing, results, and issues done to verify and validate these components
    • Summary of all testing done, results, and outstanding issues for Science Data Processing
  • Safety and Security Issues
    • Software issues with safety, how addressed, and current status
    • Software issues with security, how addressed, and current status
  • Simulations
    • Number and main details for simulations by subsystem exercised, for example: Launch, Attitude Control System, Command & Data Handling, Communication, Flight Software, Power System Electronics, Mission Operations Center, Pre-Launch, Others deemed important for project
    • Outstanding issues from Simulation testing, schedule impact, workarounds, and risks; for workarounds, when will problem/issue be permanently fixed
  • Contingencies and Constraints
    • State of Contingency Flow Chart Book and any planned updates
    • List of current constraints on system, state of database that details these constraints, and any outstanding actions that need to be taken
    • Audits that were done and against what areas to verify constraints
    • Operational problem escalation process
    • Operational emergency notification process including telephone numbers to be called
  • Documentation Readiness - Status of
    • Version Description Document(s); its location, and any outstanding issues
    • Software User's Manual; its location, and any outstanding issues
    • Software Operations Plan; its location, and any outstanding issues
    • Software Maintenance Plan; its location, and any outstanding issues
    • Software Retirement Plan; its location, and any outstanding issues
  • Lessons Learned
    • Lessons Learned captured from software areas of the project; indicate the problem or success that generated the Lesson Learned, what the Lesson Learned was, and its applicability to future projects
    • Confirmation that Lessons Learned added to Lessons Learned database
  • Work Remaining
    • All launch critical work that needs to be completed before launch along with expected completion data
    • RFA and RID reports generated as result of this ORR
  • System, including any enabling products, is determined to be ready to be placed in operational status
  • All applicable lessons learned for organizational improvement and systems operations have been captured
  • All waivers and anomalies have been closed
  • Systems hardware, software, personnel, and procedures are in place to support operations
  • All project and support (flight and ground) h/w, s/w, and procedures are ready for operations and user documentation accurately reflects the deployed state of the entire system

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  • Summary of status for Operational Readiness
    • Ground Systems
    • Flight Systems
    • Science Systems
    • Documentation including contingency book readiness
    • Operational support and maintenance support plans
    • Configuration control procedures
    • Waivers
    • Issues
    • Decision to proceed to Operational Readiness
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FlightReadinessReview(FRR)">Flight Readiness Review (FRR)

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  • Certification received that flight operations can safely proceed with acceptable risk
  • System and support elements confirmed as properly configured and ready for flight
  • Interfaces compatible and function as expected
  • System state supports a launch "go" decision based on go/no-go criteria
  • Flight failures and anomalies from previously completed flights and reviews resolved and results incorporated into all supporting and enabling operational products.
  • System configured for flight
  • Tests, demonstrations, analyses, audits support flight readiness

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  • Flight vehicle is ready for flight
  • Software is deemed acceptably safe for flight (i.e., meeting the established acceptable risk criteria or documented as being accepted by the PM and Designated Governing Authority (DGA))
  • Flight and ground software elements are ready to support flight and flight operations
  • Interfaces are checked and found to be functional
  • Open items and waivers have been examined and found to be acceptable
  • Software contributions to all open safety and mission risk items have been addressed
  • No labels