7.3.2.1 Cost AggregationCost estimates are aggregated by work packages in accordance with the WBS. The work package cost estimates are then aggregated for the higher component levels of the WBS (such as control accounts) and ultimately for the entire project.7.3.2.2 Reserve AnalysisThis can establish both the contingency reserves and the management reserves for the project.• Contingency reserves are allowances for unplanned but potentially required changes that can result from realized risks identified in the risk register.• Management reserves are budgets reserved for unplanned changes to project scope and cost.7.3.2.3 Expert JudgmentThis expertise is provided by any group or individual with specialized knowledge or train¬ing, and is available from many sources, including: other units within the organization, con¬
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