PCB공정의 제조로트크기가 산출량과 납기, 생산원가에 미치는 영향

Abstract

21C 국제화시대에 기업환경이 바뀌어 물류비용과 품질비용이 경영의 수익성에 크게 영향을 미친다. PCB공정의 현실적 재공품(WIP)을 설정하고,현재의 제조로트크기를 변화 시켜 산출량(Throughput)을 증대시키고, 기존의 경제적 로트생산량(EOQ)의 산출 요소인 준비작업비용,재고유지비용,생산원가 이외에 물류비용,품질비용을 추가하여 새로운 EOQ를 연구함으로써, 납기단축, 생산비용 최소화, 경영수익성 향상의 방향을 제시함.; Recently, most of enterprises are faced with the difficulties imposed by demands for improved productivity, global competition, and technological advances. In particular, on-time delivery of a variety of products with cost-effective small batch sizes plays an important role in surviving in the ever-increasing competitive environment where offshoring is widely exploited. Motivated by this, this work studies a methodology for determining economic lot sizes in consideration with costs incurred by setup, manufacturing, material handling, and defective products. Relationship among cycle time, WIP (Work-in-process), and throughput is established and a bottle neck process is identified based on Little's Law. EOQ (Economic Order Quantity) is then used to determine an economic lot size with regard to total production cost including material handling cost. To illustrate the proposed methodology, a case study is conducted with a real industry of PCB (Printed Circuit Board). The impact of various lot sizes on throughput, due date, and manufacturing cost is also investigated.