A maturity model assumes that progress comes in stages, ultimately reaching an end goal. The supply chain management (SCM) maturity model has a foundation based upon business process orientation (BPO) concepts introduced in earlier chapters. These concepts are based on Philip Crosby’s development of a maturity grid for the five stages that companies follow in adopting quality practices, as well as the Capability and Maturity Model developed by Carnegie Mellon University in Pittsburg, PA, for the software development process.