The CMMI for Software Engineering, Version 1.1, Staged Representation (CMMI-SW, V1.1, Staged) model helps organizations improve their product and service development processes. It builds on previous models like the SW-CMM and focuses on software engineering concepts such as process and project management. The model is designed to be used alongside other CMMI models for enterprise-wide process improvement. It uses maturity levels to measure process improvement across the organization.