Capability maturity model integration (CMMI) is an approach or methodology for improving and refining the software development process within an organization. It is based on a process model or a structured collection of practices.

CMMI is used to guide the improvement process across a project, division or even an entire organizational structure. It also allows companies to integrate organizational functions that are traditionally separate, set goals for process improvements and priorities, provide guidance for quality processes, and act as a point of reference for appraising processes.