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Development of a Systematic Technique for Analyzing the Effectiveness of Aircraft Class IV Modifications

出版	Defense Technical Information Center, 1978
URL	http://books.google.com.hk/books?id=0syHNwAACAAJ&hl=&source=gbs_api

註釋This study uses data from the Air Force Maintenance Requirements Data System (G098) to develop an assessment technique which uses parametric and nonparametric statistical mean difference tests to evaluate the effectiveness of Class IV modifications. Fourteen selected modifications were evaluated to demonstrate how the G098 data were compiled and analyzed by this technique. Included in this evaluation were data on maintenance actions, manhours, NORM, NORS, and failures before and after the modification. These data sets were adjusted for variations in flying hours and sorties. The data were then analyzed to determine if there were any significant improvements as a result of the Class IV modification. A modification was determined to be effective if these improvements were part of the original stated purpose of the modification as indicated on the AFLC Form 48. The results of the study indicated that a systematic assessment technique which uses existing data could be developed. (Author).