MIL-STD-109C, MILITARY STANDARD: QUALITY ASSURANCE TERMS AND DEFINITIONS (02 SEPT 1994) [REFER TO ISO-8402 OR ASQC-A8402 OR EQUIVALENT]., The purpose of this document is to promote the common use of words and phrases pertaining to quality and related programs, thus improving the clarity in communications. This document provides a standardized interpretation of quality assurance terms and definitions to be applied throughout the determination of product quality.