National Aeronautics and Space Administration (NASA). This Technical Standard approved by NASA 2010-12-08. Baseline w/ Change 1 of 2011-01-07. 138 p. This standard defines uniform safety, reliability, maintainability, and quality assurance (SRM&QA) and risk management terms to support effective communication within NASA and with its contractors. The definitions in this standard are the official NASA SRM&QA community definitions for commonly used terms. The terms and definitions contained within this standard support the interpretation and use of documentation associated with NASA’s SRM&QA activities.