Software Engineering in the Systems Engineering Life Cycle
The development of a complex software system or subsystem has a life cycle. Like for any system, the engineering of a software product consists of analysis and design, construction testing, operation, maintenance, and eventually retirement or replacement.
In Part 3 of the SEBoK, SE and Management, there is discussion of SE life cycle models and processes, with special attention to the Vee and Iterative process models. Both models, with some modification, apply equally to the development of software products and systems. Part 3 also discusses the IEEE standard on System Life Cycle Processes [IEEE 15528] which describes a set of processes that address the various phases of the SE life-cycle – for example, Project Planning, Requirements Analysis, Architectural Design, Implementation, Verification, Operation, Maintenance, and Disposal. There is a corresponding IEEE standard on Software Life Cycle Processes [IEEE 12207], which describes a set of processes that address the various phases of the software life-cycle – for example, Requirements Analysis, Architectural Design, Detailed Design, Construction, Verification, Maintenance, Operation, and Disposal.
When the software part of system is complex enough to be considered a subsystem, its life-cycle would be assimilated as part of the life-cycle of the entire system, with such activities as software requirements analysis, and software verification and validation embedded as part of the corresponding systems activities. Table 2 presents some of the models, methods and tools used in software engineering. The table is meant to illustrative and is not exhaustive or complete.
[IEEE 12207] IEEE Computer Society, IEEE Standard for Systems and Software Engineering —Software Life Cycle Processes, IEEE Std 12207-2008, 2008.
[IEEE 15528] IEEE Computer Society, IEEE Standard for Systems and Software Engineering —System Life Cycle Processes, IEEE Std 15528-2008, 2008.
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