an analysis of a specific job in an effort to find the most efficient method in terms of time and effort
同义词：time and motion study, time-and-motion study, time-motion study, motion study, time study, work study
work-study详细解释
work-stud.y adj.（形容词）Of, relating to, or being an academic program that enables high-school or college students to gain work experience and make money while continuing their studies.半工半读的：一种课程计划，使高中生或大学生在继续学业的同时获得工作经验并赚钱的，或与其有关的
