The People Capability Maturity Model (People CMM) is a framework that describes 5 levels of evolution for workforce practices, from ad hoc to optimized. It helps organizations improve processes for managing and developing employees. The initial level lacks consistent practices. Level 2 focuses on unit-level staffing and performance. Level 3 aids in developing competencies. Level 4 allows for quantifying and predicting capabilities. Level 5 treats change management as a regular business process.