N-UNCOUNT [usually NOUN n] （旨在研究效率最高的工作方法的）时间与动作（研究） A time and motion study is a study of the way that people do a particular job, or the way they work in a particular place in order to discover the most efficient methods of working. （旨在研究效率最高的工作方法的）时间与动作（研究）