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1. Introduction and Chart
1. Introduction and Chart
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2. Resources
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This chart summarizes current guidance approved by the NASA Office of the Chief Engineer (OCE) for software engineering life-cycle products and their maturity level at the various software project life cycle reviews. This chart serves as guidance only and NASA Center procedures should take precedence for projects at those Centers.
The chart was constructed using the software engineering products from NPR 7150.2, the project life-cycle reviews from NPR 7123.1
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041
, previous work from the NASA Software Working Group to map products to life -cycle reviews, and additional information gathered from these NPRs, NPR 7120.5
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082
, and individual NASA Center procedures. Draft versions of the chart were reviewed by the NASA Software Working Group resulting in this chart which represents the current consensus guidance from this collection, collation, and review process.
The following maturity definitions from NPR 7120.5
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082
are used in this table:
a. "Preliminary" is the documentation of information as it stabilizes but before it goes under configuration control. It is the initial development leading to a baseline. Some products will remain in a preliminary state for multiple life cycle reviews. The initial preliminary version is likely to be updated at subsequent life cycle reviews but remains preliminary until baselined. b. "Baseline" indicates putting the product under configuration control so that changes can be tracked, approved, and communicated to the team and any relevant stakeholders. The expectation on products labeled "baseline" is that they will be at least final drafts going into the designated life cycle review and baselined coming out of the life cycle review. Updates to baselined documents require the same formal approval process as the original baseline. c. "Update" is applied to products that are expected to evolve as the formulation and implementation processes evolve. Only expected updates are indicated. However, any document may be updated, as needed. Updates to baselined documents require the same formal approval process as the original baseline.
NPR 7150.2 does include life-cycle products which are not included in the chart and there are life-cycle reviews which are also not represented in the chart. Insufficient information currently exists or consensus was not reached for those elements which will all be considered for future updates to this chart.
7150.2 Software Life-Cycle Products
MCR
SRR
MDR
SDR
PDR
CDR
SIR
TRR
SAR
ORR
Software Development Plan (SDP) / Software Management Plan (SMP)
P
P
B
U
Software Schedule
D
P
U
U
B
U
Software Cost Estimate
D
P
U
U
B
U
Software Configuration Management Plan (SCMP)
P
P
B
U
Software Test Plans
P
B
U
U
Software Test Procedures
P
B
Software Test Reports
F
Software Maintenance Plan
D
P
P
B
U
Software Assurance Plan(s)
P
P
P
B
U
Software Safety Plan, if safety-critical s/w
P
B
U
Software Requirements Specification (SRS)
P
B
U
U
Requirements on OTS s/w
P
B
U
Software Data Dictionary
P
B
Software Design Description (Architectual Design)
B
U
U
Software Design Description (Detailed Design)
P
B
U
Interface Design Description
P
B
U
Software User's Manual (SUM)
B
Records of Continuous Risk Management
P
U
U
U
U
U
U
Measurement Analysis Results
X
X
Operational Concepts (part of "Mission Operations Concept" or separate)
P
U
B
U
Record of trade-off criteria & assessment (make / buy decision)
X
X
Acceptance Criteria and Conditions
P
B
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Maturity Types Key
F = Final, D = Draft, P = Preliminary, B = Baseline, U = Updated/Updated as required, X = assume complete (final), not explicit in NPRs
Panel
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Review Types Key
MCR = Mission Concept Review, SRR = System Requirements Review, MDR = Mission Definition Review, SDR = System Definition Review, PDR = Preliminary Design Review, CDR = Critical Design Review, SIR = System Integration Review, TRR = Test Readiness Review, SAR = System Acceptance Review, ORR = Operational Readiness Review
