ITPEC IP April 2019 Question 47
In the process of system requirements definition, which of the following is an appropriate evaluation criteria for system requirements?
Explanation
Consistency with needs of the system outsourcer — system requirements are evaluated against the needs of the party that orders the system.
The "system outsourcer" is the organisation that outsources the development, the acquirer. The system requirements are its needs restated as requirements for the system, so the criteria for evaluating them are traceability to and consistency with the acquirer's needs, testability, and the feasibility of designing, operating and maintaining the system.
Answer (b)
Why not others:
- •(a) — the results of the system integration test do not exist yet during requirements definition; the test is later checked against the requirements, not the other way round
- •(c) — whether the design method is appropriate is evaluated in the design phase
- •(d) — test case coverage is evaluated when the tests are designed and run
Key rule: Each phase is evaluated against its input: requirements against the acquirer's needs, design against the requirements, tests against the design and requirements.
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