In Software configuration management, what is the primary purpose of version control ?
To control the changes made to software
Software configuration management (SCM) is the discipline of identifying, organising and controlling the work products of a software project throughout its life. Its main activities are configuration identification, version control, change control, configuration auditing and status reporting.
Version control manages the different versions of every configuration item: it records who changed what and when, allows earlier versions to be restored, supports branching and merging, and prevents uncontrolled overwriting of work. Its primary purpose is therefore to keep the changes made to the software under control.
Documenting user requirements belongs to requirements engineering (the SRS); estimating project cost is part of project planning with models such as COCOMO; designing the software architecture is a design-phase activity. None of these is the job of version control.
To control the changes made to software option is correct.
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