What is the CIM lacking?

The IEC 61970/61968 Common Information Model is undoubtedly one of the core standards of the future smart grid as pointed out by different organizations and recent standardization roadmaps. Its acceptance in the energy sector and the active standardization work is very high and make it one of the most established standards worldwide in the energy domain. But not all requirements are met by the CIM to be the standard of choice in any possible situation. This work tries to specify some of the main gaps identified in different research projects like in the German e-energy projects and in day-to-day business with electric utility companies and the surrounding industry. There is also the attempt to recommend some known approaches to these gaps and to advise general solutions to encounter problems while using the Common Information Model.