Ranges, contingency and the conversations that follow. How to produce a number you can defend when it is challenged.
Terms
Money held inside the cost baseline, or time held inside the schedule baseline, for risks already identified, assessed and priced, and drawn on by the project manager as they occur.
The approved, time phased budget a project is measured against, made up of the priced work packages plus their contingency reserve, and excluding management reserve.
Money held above the cost baseline for exposure nobody identified during planning, released by the sponsor or the funding body and never by the project manager.