过去的机械加工工时核算主要采用粗略的经验估算方法制定时间定额,时间定额标准很不统一。
Machining man-hour calculation the past mainly uses the rough experience to develop time quota estimation method , time quota standard is not unified .
轿车制造操作时间定额标准的编制研究及作用
Establishment of Operation Time Quota for Car and its Effects