Abstract: There are many actions contained in automobile assembly,using wire installation position of automobile left tail gate as examples to put forward a new kind of design method of standard time that is modular design method in order to improve the efficiency of formulating standard time.Based on Methods-Time Measurement-Universal Analyzing System (MTM-UAS),the assembly action can be divided into constant action elements and variable action,and the process contained repetitive process is as a module which formats standard time formula.The five processes that exist in “laying wiring harness” assembly work are applied by this method,concluded standard time formulation of five module by a module as a process to design.The standard time of process analyzed by new method and MTM-UAS is identical by comparing,but analysis speed is improved.It can be seen that the modular design method of standard time can improve the efficiency of the time analysis,and it can be extended to all process contained repetitive action.

Key words: MTM-UAS, modular design method, automobile assembly, standard time