National Aeronautics and Space Administration (NASA). This Technical Standard approved by NASA 07.11, 2008 . Expiration Date: 07-10-2013. Superseding NASA-STD-(I)-7096. 58 p. The scope of this standard covers the development and maintenance of models, the operation of simulations, the analysis of the results, training, recommended practices, the assessment of the M&S credibility, and the reporting of the M&S results. Some of the key features of this standard are requirements and recommendations for verification, validation, uncertainty quantification, training, credibility assessment, and reporting to decision makers; also included are the crosscutting areas of documentation and configuration management (CM).