CMMI-SVC and CMMI-DEV differ significantly. CMMI-SVC has a wider scope that applies to most organizations beyond just IT. It introduces 7 new process areas focused on service delivery and systems. While engineering overlaps with service system development, CMMI-SVC contains additional material not covered by engineering. Work and work groups play the role of projects in development. There are also differences in common text between the two models. CMMI best practices should be tailored to each organization's context to provide value.