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通过对外场维修性数据采集方案的合理设计与具体的数据收集和分析工作，研究了飞机的维修性参数──每飞行小时直接维修工时（DM－MH/FH外场级）指标的定量评估方法．就如何保证外场维修性数据采集的充分性和有效性、对数据的统计处理方法做了简要论述．结合某型飞机的统计数据．给出了采用计算机进行数据处理的结果──“勺形曲线”．
Through the reasonable design and data collection and analysis of the maintenance data collection program in the field, the maintenance parameter of the aircraft - the quantitative evaluation method of direct maintenance man-hour (DM-MH / FH field level) per flight hour is studied. On how to ensure the adequacy and effectiveness of data collection in field maintenance, this paper briefly discusses the statistical processing of data. Combined with a type of aircraft statistics. The result of computerized data processing is given - “spoon-shaped curve”.