6.2b C4V manages the supply chain using supplier-input-process-output-customer (SIPOC) mapping. Suppliers are selected through the formalized government contracting system under the FAR. The contracting system fosters efficient and economic procurement of all products through standardization of products and utilization of national or other consolidated contracts. User preference is balanced with standardization for economies of scale, with justification required to permit deviation from the standard to provide the best value. C4V provides clear communication to the CO or COR about requirements and expectations based on the identified requirements and expectations of C4V customers.