At first, you could believe CMMI is only for large organizations, of course it should be capable to help big organizations, but what about small businesses. There exist many articles about CMM/CMMI for small organizations, just google with the phrase “CMMI for Small Organization” and you will find useful papers and articles.
One of the early papers I found useful was Dynamic CMM for Small Organizations.
I got a comment from a friend that, Indian Lead appraisals could certify a maturity level to companies with just four employees, yes just 4 employees! So whatever your company size, don’t feel afraid from CMMI. This does not mean it is easy, but means size will not stop you from progressing with CMMI model.