In a coherence model, the CMMI model combines Software, Systems, Integrated Process and Product Development, and Supplier Sources. SEI released version 1.1 of the model in early 2001, and it is
currently being used by industry around the world. For the software sector, the benefit of CMMI over SW CMMI is that the current CMMI model has been improved over the previous SW CMMI version 1.1.