"Configuration management is the application of sound program practices to establish and maintain consistency of a product's or system's attributes with its requirements and evolving technical baseline over its life. It involves interaction among government and contractor program functions such as systems engineering, hardware/software engineering, specialty engineering, logistics, contracting, and production in an Integrated Product Team environment. The program manager should use configuration management to establish and mature the technical baseline throughout the acquisition life cycle." Source: Defense Acquisition Guidebook (DAG), Para 4.2.3.1.6.
"Configuration management is defined as a process for establishing and maintaining consistency of a product’s performance, functional and physical attributes with its requirements, design and operational information throughout its life." Source: MIL-HDBK 61A Configuration Management