ITIL® CMM are the two broad frameworks available for the departments of Service Management and software development respectively. If you desire maximum output from your set-up, implementation of both the ITIL® CMM frameworks are advised.
ITIL® CMM frameworks are complementary to each other and they are taken in account in the process of mapping. CMM framework creates solutions and act as a guide to software developers while ITIL® framework is a complete tool for IT Managers managing IT infrastructure. You can say that they are the pillars of progress of the IT industry.
It is often considered that both the models constitute of 5 levels. However, while Mapping and detailing, ITIL® has 9 measurement levels. Professionals sometimes face the challenge in CMM to ITIL® Mapping.