ITPEC IP October 2025 Question 54

WBS — the Work Breakdown Structure decomposes the project's deliverables, and the work to create them, level by level.

The top level is the project; below it come the major deliverables or phases, then their components, down to work packages small enough to estimate in cost and duration and to assign to one person or team. The WBS defines the scope: work that is not in it is not part of the project. Schedules, cost estimates and progress measurement are all built on its work packages.

Answer (d)

Why not others:

• •(a) EVM — Earned Value Management measures schedule and cost performance by comparing planned value, earned value and actual cost; it uses the WBS but is not the decomposition
• •(b) RFP — a Request for Proposal asks vendors to submit proposals in procurement
• •(c) SLA — a Service Level Agreement sets the service levels agreed between an IT service provider and its user

Key rule: A WBS follows the 100% rule: each level holds all of the work of the level above and nothing more, so the full WBS is the whole scope of the project.

Project Management · AI-written, may contain errors