NASA-Systems Engineering

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Unformatted text preview: ring Handbook The Project Life Cycle for Major NASA Systems 3 The Project Life Cycle for Major NASA Systems One of the fundamental concepts used within NASA for the management of major systems is the program/project life cycle, which consists of a categorization of everything that should be done to accomplish a project into distinct phases, separated by control gates. Phase boundaries are defined so that they provide more-or-less natural points for go/no-go decisions. Decisions to proceed may be qualified by liens that must be removed within a reasonable time. A project that fails to pass a control gate and has enough resources may be allowed to “go back to the drawing board"—or it may be terminated. All systems start with the recognition of a need or the discovery of an opportunity and proceed through various stages of development to a final disposition. While the most dramatic impacts of the analysis and optimization activities associated with systems engineering are obtained in the early stages, decisions that affect millions of dollars of value or cost continue to be amenable to the systems approach even as the end of the system lifetime approaches. Decomposing the project life cycle into phases organizes the entire process into more manageable pieces. The project life cycle should provide managers with incremental visibility into the progress being made at points in time that fit with the management and budgetary environments. NASA documents governing the acquisition of major systems (NMI 7120.4 and NHB 7120.5) define the phases of the project life cycle as: • • • • • Pre-Phase A—Advanced Studies ("find a suitable project") Phase A—Preliminary Analysis ("make sure the project is worthwhile") Phase B—Definition ("define the project and establish a preliminary design") Phase C—Design ("complete the system design") Phase D — Development ("build, integrate, and verify the system, and prepare for...
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This document was uploaded on 02/26/2014 for the course E 515 at University of Louisiana at Lafayette.

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