AFGS�87219B APPENDIX A
VERIFICATION RATIONALE (A.4.8.1.1)
Verification of fault detection/isolation is needed to assure that appropriate actions have been taken at each step in the integrated diagnostics design process to incorporate fault detection/isolation capability, to establish that these measures prove effective, and to provide an initial mechanism for identifying and accomplishing corrective actions when needed.
VERIFICATION GUIDANCE (A.4.8.1.1)
Specific fault detection/fault isolation (FD/Fl) capability requirements for subsystems and equipment are determined by a requirements allocation process beginning at the system level and allocating requirements downward to individual subsystems and equipment using appropriate trade studies, cost benefit analyses, and maintenance timeline analyses to achieve an optimum solution. FD/Fl capability implementation begins with the design phase of single repairable items and continues as these items are integrated into equipments, subsystems, and systems. ln-process verification of FD/Fl capability should begin with review of allocation process studies and analyses and correlation of their results with functionally based FMEA/FMECA failure detection method entries. ln-process verification of BlT capability should begin with review of testability analyses and continue with review of test requirements documents and developmental and integration testing of equipment items, subsystems, and systems. Review and correlation of FMEA/FMECA results, especially failure detection method entries, in conjunction with testability analyses should be used to help assure adequacy of FD/Fl. Prime mission subsystem and equipment development (including qualification) and integration tests, test program set development tests, and support equipment and
maintenance system tests provide additional opportunities to verify test compatibility and to identify and accomplish corrective actions as needed. Final verification of fault detection/isolation capability can be accomplished using the maintainability verification/demonstration/evaluation procedure of MlL-HDBK-470.
VERIFICATION LESSONS LEARNED (A.4.8.1.1) A.3.8.2 Packaging, handling, storage, and transportation (PHST).
The EPS, its subsystems and components shall be designed with PHST characteristics that allow
it to be readily transported in the logistics environment at the lowest life cycle cost. The PHST
characteristics that will be established as requirements include ------------.
REQUIREMENT RATIONALE (A.3.8.2)
Designing systems and equipment with optimum PHST characteristics contributes to operationally effective and supportable systems and equipment, at the lowest life cycle cost.
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