For new access to space systems support may be needed

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Unformatted text preview: .1. The trade studies focus on different issues depending on the phase of the project. In Phases A and B, trade studies focus on high-level issues such as whether a spacecraft in LEO should be serviceable or not, what mix of logistics modules seems best to support an inhabited space station, or what's the optimum number of maintenance levels and locations. In Phases C and D, the focus changes, for example to an individual end-item's optimum repair level. In Phase E, when the system design and its logistics support requirements are essentially understood, trade studies often revisit issues in the light of operational data. These trade studies almost always rely on techniques and models especially created for the purpose of doing a LSA. For a catalog of LSA techniques and models, the system engineer can consult the Logistics Support Analysis Techniques Guide (1985), Army Materiel Command Pamphlet No. 700-4. By the end of Phase B, the results of the ILSS functional analyses and trade studies should be sufficiently refined and detailed to provide quantitative data on the logis- MIL-STD-1388-1A/2B NHB 7120.5 suggests MIL-STD 1388 as a guideline for doing an LSA. MIL-STD 1388-1A is divided into five sections: • LSA Planning and Control (not shown in Figures 31a and 31b) • Mission and Support System Definition (shown as boxes A and B) • Preparation and Evaluation of Alternatives (shown as boxes C, D, and E) • Determination of Logistics Support Resource Requirements (shown as box F) • Supportability Assessment (shown as boxes G and H. MIL-STD 1388-1A also provides useful tips and encourages principles already established in this handbook: functional analysis, successive refinement of designs through trade studies, focus on system effectiveness and life-cycle cost, and appropriate models and selection rules. MIL-STD 1388-2B contains the LSAR relational data table formats and data dictionaries for documenting ILS information and LSA results in machine-readable form. tics support resource requirements. This is accomplished by doing a task a...
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