Is the CMMI Framework robust enough to support future models?

Yes Debashish is right here recently, the CMMI model architecture was improved to support multiple constellations and the sharing of best practices among constellations and their member models. Work has already begun on two new constellations: one for acquisition (CMMI for Acquisition) and the other for services (CMMI for Services). Although CMMI for Development incorporates the development of services, including the combination of components, consumables, and people intended to meet service requirements, it differs from the planned CMMI for Services (CMMI-SVC) constellation, which largely focuses on the delivery of services. The CMMI models that have been available in the community prior to 2006 are now considered part of the CMMI for Development constellation. hope this helps.

According to me yes, the architecture of the CMMI Framework is designed to allow the future addition of other disciplines and the coverage of other areas of interest within CMMI. To apply to multiple areas of interest, the framework groups the best practices into "constellations." where a constellation is a collection of CMMI components that are used to build models, training materials, and appraisal documents.