การเพิ่มผลิตภาพในสายการผลิตสายไฟในรถยนต์

Abstract

The aim of this research is to increase the productivity of assembly lines for wire harness through the first methodology of work study. Next, the flow process chart was employed for data record. Lastly, the improvement was implemented by analysis of the value- and non-value-added activity (or VA and NVA, respectively) on each activity. Before improvement, there were totally existing 81 activities, which 20 and 61 of them were VA and NVA, respectively. In other words, VA was equal to a percentage of 24.69. These activities were 24, 33, 16 and 7 of operation, transportation, waiting and checking, respectively including the transportation distance of 331 meters. Subsequently, the author applied the principle of ECRS (standing for Eliminate, Combine, Rearrange and Simplify) for improvement. Outcomes exhibit that the decrease of a number of activities, distance, lead time and a number of employees is 9, 183, 238 and 2, respectively. Or else, their reduction as a percentage is 11.11, 55.29, 33.18 and 11.76, respectively. In terms of an economic value as a tangible perception, a decrease number of 2 employees indicates that the salary reduction is 198,600 baht annually.