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The CMM model's application in software development has sometimes been problematic.

Applying multiple models that are not integrated within and across an organization could be costly in training, appraisals, and improvement activities.

The Capability Maturity Model Integration ( CMMI ) project was formed to sort out the problem of using multiple models for software development processes, thus the CMMI model has superseded the CMM model, though the CMM model continues to be a general theoretical process capability model used in the public domain.