Since the writing of NASA/SP-6105 in 1995, systems engineering at the National Aeronautics and Space Ad-ministration (NASA), within national and international standard bodies, and as a discipline has undergone rapid evolution. Changes include implementing standards in the International Organization for Standardization (ISO) 9000, the use of Carnegie Mellon Software Engi-neering Institute's Capability Maturity Model(R) Integration (CMMI(R)) to improve development and delivery of products, and the impactsof mission failures. Lessons learned on systems engineering were documented in re-ports such as those by the NASA Integrated Action Team (NIAT), the Columbia Accident Investigation Board (CAIB), and the follow-on Diaz Report. Out of these efforts came the NASA Office of the Chief Engineer (OCE) initiative to improve the overall Agency systems engineering infrastructure and capability for the efficient and effective engineering of NASA systems, to produce quality products, and to achieve mission success. In addition, Agency policy and requirements for systems engineering have been established. This handbook update is a part of the OCE-sponsored Agencywide systems engineering initiative.Black and white print.