The CMMI Steering Group initially approved an introductory collection of acquisition best practices called the Acquisition Module (CMMI-AM), which was based on the CMMI Framework. While it sought to capture best practices, it was not intended to become an appraisable model nor a suitable model for process improvement purposes.

General Motors partnered with the SEI to create the initial draft Acquisition model that was the basis for this model. This model represents the work of many organizations and individuals.

Acquirers should use professional judgment and common sense to interpret this model for their organizations. That is, although the process areas described in this model depict behaviors considered best practice for most acquirers, all process areas and practices should be interpreted using an in-depth knowledge of CMMI-ACQ, organizational constraints, and the business environment.

This document is a reference model that covers the acquisition of needed capabilities. Capabilities are acquired in many industries, including aerospace, banking, computer hardware, software, defense, automobile manufacturing, and telecommunications. All these industries can use CMMI-ACQ.