For the past two decades, the number of organizations implementing maturity models has steadily increased. While the initial adopters were the large defense, aerospace, and telecommunications corporations, as the benefits of using models like the CMM and now the CMMI were demonstrated and recognized by industry, other smaller organizations followed suit. Of course, with this increased demand, there is also an increased emphasis in implementing the models and appraising organizations with fewer than twenty-six people.
ExecutiveBrief just published this article I wrote about the challenges faced by small organizations trying to implement the CMMI. You read the entire article at http://www.executivebrief.com/article/small-business-and-cmmi-sink-or-swim/