What MUST accompany a project budget to clearly identify any assumptions, clarifications, inclusions, or exclusions the team made while preparing the budget?

• A. Basis of estimate narrative
• B. Budget justification report
• C. Risk assessment matrix
• D. Procurement plan

Answer: (B)

The main idea is to pair the budget with a document that records exactly how the numbers were derived. A budget justification report serves this purpose by outlining the assumptions, clarifications, inclusions, and exclusions that the team used when preparing the budget. This provides a clear, auditable rationale for each line item and overall totals, so stakeholders can understand why costs look the way they do, what was considered, and what was left out. It also supports future re-estimates or scope changes by showing the basis on which the budget was built, making it easier to justify adjustments.

Other documents focus on different aspects: a basis of estimate narrative gets into the costing methods and data used to build the numbers, which is important but not the primary vehicle for listing every assumption and scope inclusion/exclusion; a risk assessment matrix addresses potential threats and their impact rather than documenting budget-building assumptions; a procurement plan details how purchases will be executed, not the rationale behind the budget itself.