Process Capability Baseline...

PCB specifies, based on data of past projects, what the performance of a process is. That is, what a project can expect by following a process. The performance factors of a process are primarily those that relate to quality and productivity. PCBs define - Productivity, Quality, Effort Distribution, Defect Distribution, Defect Injection Rate, CoQ, etc.

Using the capability baseline, a project can predict at a gross level the effort that will be needed for various stages, the defects likely to be observed during various development activities, and quality and productivity of the project.