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Necessary and sufficient conditions are used in law, logic, and a number of other disciplines. In what way can a project manager benefit from the use of the necessary and sufficient concept?

A. A project manager should check to make sure he has the necessary resources and sufficient time to complete the project.

B. It is a concept that can be used to verify the correct level of decomposition for WBS and activity definition.

C. Project managers only use this concept with projects that involve contracts with outside vendors.

D. There is no such concept.

As per PMBOK,
Page no.131, Verifying the correctness of the decomposition requires determining that the lower-level
WBS components are those that are necessary and sufficient for completion of the corresponding higher-level deliverables. Different deliverables can have different levels of decomposition.

Regards,
Vishwanath