製造業生產流程中降低在製品存貨之投料決策

Lot Release Decision for Reducing WIP in Production Process of Manufacturing Industry

林偉煜(Wei-yu Lin)

指導教授 ： 黃遵鉅

大同大學/經營設計學院/資訊經營學系所/碩士(2007年)

摘要

全球化的競爭環境和動態變化的生產現場下，製造業為了保持商業競爭力，發展好的排程與控制策略是必須的，而投料決策更是影響生產績效的重要因素。本研究在接單型生產的模式下，以可控性之概念結合排程技術，模擬實際製造廠生產排程，由現在時間點開始至未來，對於投料時間點作管控，考量同一訂單內產品組合的不同，而使完工時間能盡量接近。
本研究提出之投料方式是從交期最晚的訂單開始，採用「訂單軸向上」的反向(Backward)方式，推估各訂單之交貨日期後，再正向(Forward)排定各產品的投料日期，同時以「彈性」使用模板的方式，考量每天最多十副模板的限制。由模擬結果的分析，可以驗證本研究發展之投料方式較原實際生產之投料方式好。可使同一張訂單內不同產品之完工時間差距縮短，提昇出貨達交率，降低在製品數量與時間，且提供管理者制定投料決策的依據，降低成本，提昇顧客滿意度，增加企業競爭力。

關鍵字

模擬 ； 投料 ； 在製品 ； 決策

並列摘要

In the global competition and the environment changed dynamically, the manufacturing industry must develop the better schedule and control strategy in order to keep the commercial competency. And the lot release decision is the important factor to influence the production performances. In make-to-order (MTO) condition, our study uses the controllable concept and the schedule technique to simulate the production schedule of the real factory. The lot release strategy developed by us starts from the order of the latest due date, and adopts the “backward” way to estimate the warehousing date of per order. Then we use the “forward” way to arrange the lot release date of each product, and consider the restriction at most ten templates every day. From the experimental results, it is able to show that our lot release strategy is better than the original one. Our strategy could reduce the quantities and time of work-in-process (WIP) , raise the hit-rate, and shorten the gap of completion time between the different products in the same order. So it could help decrease the production cost, and increase the enterprise competency.

並列關鍵字

Simulation ； Lot release ； WIP ； Decision

參考文獻

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