การปรับปรุงการจัดสรรกำลังคนสำหรับสายการผลิตนมผง : กรณีศึกษา

Abstract

Manpower or operators is the important issue for manufacturing process since it affects the production costs. This research aimed to propose the improvement of manpower guidelines in order to reduce overtime costs of the factory case study. Research methodology started by studying current situation of the factory case study. Related data was then collected which were product types, current manpower using in the production process, manpower arrangement to the production line. In the present, number of operators using in the production line was constant set at 111 persons per shift. Even produced what kind of products, the number of operators per shift was always the same. In this study, the manpower was determined under the production process. After that, the manpower was reduced by applying ECRS technique. The working time of operators was adjusted in order to reduce overtime costs of operators. There were two improvement guidelines. The first improvement guideline was changing the overtime time of operators who were responsible for switching break and operators who did not have duty in a production process. The second improvement guideline was stopping all production lines for resting break. The results of the improvement which pointed out the reduction of overtime costs showed that the suitable improvement guideline for manpower arrangement was the first improvement guideline. For pouch products, the maximum number of operators per shift was decreased to 26 persons which was 31.71% or reducing overtime costs to 2,498,496 Baht/year. For canned products, the maximum number of operators per shift was decreased to 10 persons which was 34.48% or reducing overtime costs to 960,960 Baht/year. The research output can help the factory case study to reduce overtime costs, and can be used as a guideline for manpower arrangement to the production line.