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Defect. Any occurrence in a software product that is determined to be incomplete or incorrect relative to the software requirements, expectations for the software, and/or program standards. (Source: NASA-STD-8739.9)
Embedded Computer System. A computer system that is part of a larger system and performs some of the requirements of that system. (Source: ISO/IEC/IEEE 24765)
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Failure. The behavior of the software or system component when a fault is encountered, producing an incorrect or undesired effect of a specified severity. (Source: NASA-STD-8739.9)
Fault. The manifestation of an error in software that may cause a failure. (Source: NASA-STD-8719.24 Annex)
Freeware. Software that is proprietary and that is available for use at no monetary cost. In other words, freeware may be used without payment but may usually not be modified, re-distributed, or reverse-engineered without the author's permission.
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Mission Critical. Item or function that should retain its operational capability to assure no mission failure (i.e., for mission success - meeting all mission objectives and requirements for performance and safety). (Source: NPR 8715.3)
Mission Critical Software. Software that can cause, contribute to, or mitigate the loss of capabilities that are essential to the primary mission objectives.
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Risk Management. An organized, systematic decision-making process that efficiently identifies, analyzes, plans, tracks, controls, communicates, and documents risk to increase the likelihood of achieving program/project goals. (Source: NPR 8715.3)
Safety-Critical. A term describing any condition, event, operationoperation, process, equipment, or system that could cause or lead to severe injury, major damage, or mission failure if performed or built improperly, or allowed to remain uncorrected. (Source NPR 8715.3)
Scripts. A sequence of automated computer commands embedded in a program that tells the program to execute a specific procedure (e.g., files with monitoring, logic, or commands used by software to automate a process or procedure).
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