The SCAMPI A appraisal method is the generally accepted method used for conducting ARC Class A appraisals using CMMI models. The SCAMPI A Method Definition Document (MDD) defines rules for ensuring the consistency of SCAMPI A appraisal ratings [SEI 2011a]. 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. The SCAMPI A appraisal method is the officially recognized and most rigorous method. It is the only method that can result in benchmark quality ratings. SCAMPI B and C appraisal methods provide organizations with improvement information that is less formal than the results of a SCAMPI A appraisal, but nonetheless helps the organization to identify improvement opportunities.

More information about SCAMPI methods is available on the SEI website at http://www.sei.cmu.edu/cmmi/tools/appraisals/.