This Note addresses statistical and policy issues central to improving estimates of wartime support resource requirements. It uses the current problem of establishing the level of investment in spare engines for the C-5 aircraft to elucidate a number of these issues. The author examines the assumptions used to project peacetime experience to wartime activity levels and concludes that peacetime operational experiments, coupled with engineering projections of wartime failure rates, could be used to test these assumptions and provide an improved basis for resource requirements computations.
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