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Unformatted text preview: nalysis for each task in the task inventory. These requirements are formally documented by amending the LSAR data tables. Together, ILSS trade studies, LSA models, and LSAR data tables provide the project-level system engineer with important life-cycle cost data and measures of (system) effectiveness (MoEs), which are successively refined through Phases C and D as the product system becomes better defined and better data become available. The relationship between inputs (from the specialty engineering disciplines) to the LSA process and its outputs can be seen in Figure 27 (see Section 5.3). In performing the LSA, the ILS engineer also determines and documents (in the LSAR data tables) the logistics resource requirements for Phase D system integration and verification, and deployment (e.g., launch). For most spacecraft, this support includes pre-launch transportation and handling, storage, and testing. For new access-to-space systems, support may be needed during an extended period of developmental launches, and for inhabited space stations, during an extended period of on-orbit assembly operations. The ILS engineer also contributes to risk management activities by considering the adequacy of spares provisioning, and of logistics plans and processes. For example, spares provisioning must take into account the possibility that production lines will close during the anti- NASA Systems Engineering Handbook Integrating Engineering Specialties Into the Systems Engineering Process cipated useful life of the system. As part of verification and validation activity, the ILS engineer performs supportability verification planning and gathers supportability verification/test data during Phase D. These data are used to identify and correct deficiencies in the system design and ILSS, and to update the LSAR data tables. During Phase E, supportability testing and analyses are conducted under actual operational conditions. These data provide a useful legacy to product improvement efforts and future projects. 6.5.4 Continuous Acquisition and Life -Cycle Support LSA do...
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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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