Contract Budget Base (CBB) is the basis of the negotiated, estimated, and contracted cost of the agreed scope of work and service between an owner and contractor. A CBB can be the additional authorised un-priced work, or the performance measurement baseline (PMB) plus management reserve (MR) which is an amount of the contract budget developed by the project manager at the beginning of a project. (Refer to the Control Budget)
Reference Definition by Acq.osd: Contract Budget Base (CBB) is a sum of the negotiated contract cost plus the estimated cost of authorized unpriced work. This represents the total amount of performance measurement budget that may be allocated to contract work.
Related Definitions in the Project: The Project Baseline; The Project Cost
