The SCAMPI appraisal methods are the generally accepted methods used for conducting appraisals using CMMI models. The SCAMPI Method Definition Document (MDD) defines rules for ensuring the consistency of appraisal ratings. For benchmarking against other organizations, appraisals must ensure consistent ratings. The achievement of a specific maturity level or the satisfaction of a process area must mean the same thing for different appraised organizations.

The SCAMPI family of appraisals includes Class A, B, and C appraisal methods. SCAMPI A is the most rigorous method and the only method that can result in a rating. SCAMPI B provides options in model scope, but the characterization of practices is fixed to one scale and is performed on implemented practices. SCAMPI C provides a wide range of options, including characterization of planned approaches to process implementation according to a scale defined by the user.

More information about SCAMPI methods is available on the SEI Web site at www.sei.cmu.edu/cmmi/appraisals/appraisals.html [SEI 2006b].