My organization has just started our process improvement journey. For our first appraisal, which SCAMPI class (A, B, or C) should we use?
I would strongly suggest that your organization hire either a SCAMPI Lead Appraiser or a SCAMPI B/C Team Leader to help you determine which SCAMPI appraisal A, B, or C would be best for your organization. In order for you to obtain the best information and useful results, you need to use either an SEI-trained and authorized SCAMPI B/C Team Leader or a SCAMPI A Lead Appraiser. Do not attempt to do this by yourself.
For a new client, I typically recommend an initial Gap Analysis to provide a starting point for determining the path forward. The Gap Analysis, depending upon its rigor, can be either a SCAMPI C or a SCAMPI B.