Yesterday we looked at how CMM-type maturity is not a measure of how well you are delivering service. CMM only measures sophistication of management, and actually only sophistication of empirical management. The corollary is that maturity assessments are not a measure of whether an improvement exercise was successful, not if the objective was to improve quality of service.
But wait! there's more! Mature management-by-numbers of process is neither a necessary nor a sufficient condition for improving service.