The purpose of the Quantitative Project Management (QPM) process area is to quantitatively manage the project's defined process to achieve the project's established quality and process-performance objectives.
The Quantitative Project Management process area involves the following:
Establishing and maintaining the project's quality and process-performance objectives
Identifying suitable subprocesses that compose the project's defined process based on historical stability and capability data found in process performance baselines or models
Selecting the subprocesses of the project's defined process to be statistically managed