通过对钻孔加工族的时间研究，初步建立不同工步单件加工时间的标准资料，并探讨节省作业转换时间的方法。
By studying some boring machining families, standard time datum for unit operation was set up. Some methods of shortening operation changing time were also presented.
建立所研究的区域内岗位的标准工时、标准操作规程和产能。
Establish standard cycle time, standard Operating Procedure and production capacities for posts in the study area.
同时根据抽查结果确定A企业用于建立工时标准的宽放率。
The sampling results can help firm A to establish the time ration.
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