Decomposition is a tool and technique used in which of the following?

Question

Options

• ADefine Scope and Define Activities
• BCollect Requirements and Estimate Activity Resources
• CCreate WBS and Define Activities
• DCreate WBS and Estimate Activity Duration

• A
  3% (1)
• B
  3% (1)
• C
  84% (26)
• D
  10% (3)

Explanation

Decomposition is explicitly listed as a tool and technique in both Create WBS (breaking down deliverables into smaller work packages) and Define Activities (breaking down work packages into individual schedule activities) - making C correct.

• A is wrong because Define Scope uses product analysis, alternatives analysis, and expert judgment - not decomposition - and Create WBS is replaced with Define Scope.
• B is wrong because neither Collect Requirements nor Estimate Activity Resources uses decomposition as a named tool/technique.
• D is wrong because Estimate Activity Duration uses analogous estimating, parametric estimating, and three-point estimating - not decomposition.

Memory tip: Think of decomposition as a breaking-down tool. You break down the project scope into a WBS, then break down WBS work packages into activities - both steps use the same technique, creating a natural top-to-bottom chain: WBS → Activities = Decomposition twice.

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