PMBOK Scope and WBS Development 4 — Questions and Answers
Question 1: A project team uses the 100% rule when building their WBS. This means:
- Every team member must contribute at least one work package
- The WBS captures 100% of the work defined in the scope and no more (Correct answer)
- All work packages must be exactly 100 hours in duration
- The WBS must be approved by 100% of stakeholders
Correct answer: The WBS captures 100% of the work defined in the scope and no more
The 100% rule requires that the WBS captures all work necessary to complete the project and includes no work outside the project scope.
Question 2: A requirements traceability matrix links requirements to which of the following to ensure alignment throughout the project lifecycle?
- Risk responses only
- Business needs, WBS deliverables, and test cases (Correct answer)
- Team member assignments and cost estimates
- Project schedule milestones only
Correct answer: Business needs, WBS deliverables, and test cases
The requirements traceability matrix links requirements from origin through business needs, deliverables, WBS components, and verification/validation activities.
Question 3: Which input to the Define Scope process provides guidance on how scope will be defined, validated, and controlled?
- Requirements documentation
- Scope management plan (Correct answer)
- Project charter
- Stakeholder register
Correct answer: Scope management plan
The scope management plan describes how the project scope will be defined, developed, monitored, controlled, and validated.
Question 4: A project is constructing a hospital. The WBS includes 'Patient Ward' as a level-2 element. Level-3 elements include 'Electrical Systems' and 'Plumbing.' What decomposition approach is being used?
- Functional decomposition by department
- Phase-based decomposition
- Deliverable-based decomposition by physical location (Correct answer)
- Resource-based decomposition
Correct answer: Deliverable-based decomposition by physical location
Decomposing by major deliverable or physical component (ward) into its subsystems (electrical, plumbing) is deliverable-based decomposition.
Question 5: A project manager wants to collect requirements from 200 geographically dispersed stakeholders efficiently. The BEST technique is:
- Focus groups in each location
- Questionnaires and surveys (Correct answer)
- Facilitated workshops
- Observation sessions
Correct answer: Questionnaires and surveys
Questionnaires and surveys are the most efficient method for gathering structured data from large, geographically dispersed groups.
Question 6: What is the primary benefit of including a scope baseline in the project management plan?
- It eliminates the need for stakeholder reviews
- It provides a fixed reference for measuring scope performance and managing changes (Correct answer)
- It guarantees budget approval by the project sponsor
- It removes the need for a WBS dictionary
Correct answer: It provides a fixed reference for measuring scope performance and managing changes
The scope baseline serves as the approved reference against which project scope execution is compared and change requests are evaluated.
Question 7: During a project review, an auditor finds that team members are completing work NOT listed in the WBS. What PMBOK process should have prevented this?
- Validate Scope
- Control Schedule
- Control Scope (Correct answer)
- Define Activities
Correct answer: Control Scope
Control Scope monitors project and product scope status and manages changes to the scope baseline, preventing unauthorized work.
PMBOK Scope and WBS Development 4
A project team uses the 100% rule when building their WBS.
This means: