A Roadmap for Getting Started-Quickly The advent of effective store-level DRP systems creates a competitive advantage. Companies in retail supply chains that embrace disciplined internal organization routines (S&OP) and external routines with their trading partner (CPEF) will multiply the benefits of robust and dynamic automatic demand planning. The GS1 US CPFR Work Group recommended in its most recent guideline that retailers undertake a streamlined investigation to assess the benefits of these new solutions for their businesses