700 4 by the end of phase b the results of the ilss

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Unformatted text preview: ity-related design factors, which are passed back to the project-level system engineer. This means: • Identifying and estimating the magnitude of supportability factors associated with the various system and operations concepts being considered. Such factors might include operations team size, system RAM (reliability, availability and maintain NASA Systems Engineering Handbook Integrating Engineering Specialties Into the Systems Engineering Process • • • ability) parameters, estimated annual IVA/EVA maintenance hours and upmass requirements, etc. Using the above to assist the project-level system engineer in projecting system effectiveness and life cycle cost, and establishing system availability and/or system supportability goals. (See NHB 7120.5, and this handbook, Section 5.3.3.) Identifying and characterizing the system supportability risks. (See NHB 7120.5, and this handbook, Section 4.6.) Documenting supportability-related design constraints. The heart of the LSA lies in the next group of activities, during which systems engineering and analysis are applied to the ILSS itself. The ILS engineer must first identify the functional requirements for the ILSS. The functional analysis process establishes the basis for a task inventory associated with the product system and, with the task inventory, aids in the identification of system design deficiencies requiring redesign. The task inventory generally includes corrective and preventive maintenance tasks, and other operations and support tasks arising from the ILSS functional requirements. A principal input to the inventory of corrective and preventive maintenance tasks, which is typically constructed by the maintainability engineer, is the FMECA/FMEA (or equivalent analysis). The FMECA/FMEA itself is typically performed by the reliability engineer. The entire task inventory is documented in Logistics Support Analysis Record (LSAR) data tables. The ILS engineer then creates plausible ILSS alternatives, and conducts trade studies in the manner described earlier in Section 5...
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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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