存貨式生產與訂單式生產模式比較-以血糖試片H公司為例

Abstract

現今全球糖尿病檢測試片的需求量與日俱增，在近年來政府大力發展下，更使台灣糖尿病監測產品蓬勃發展，然而傳統上認為以預測需求，預先建立庫存的存貨式生產模式 (Make to Stock, MTS)，可滿足客戶訂單需求，但預測不一定準確，反而造成高在製品與庫存壓力。訂單式生產模式 (Make To Order, MTO) 雖可降低庫存，但需要更短的週期時間，才能達到良好的訂單績效。本研究以MTO確定訂單後才投料生產，運用縮小生產批量與移轉批量使用，建立三種實驗情境，並以一血糖檢測試片製造廠商為實際案例，比較在系統在製品數量，週期時間與訂單達交率三項指標上的優劣。實驗發現MTO的生產方式可降低庫存，加上縮小生產批量與移轉批量使用可壓縮血糖試片的生產週期時間。

The demand for blood glucose test strips increases each day. With the help of the Taiwanese Government’s heavy input and guidance, the Taiwanese glucose monitor industry flourishes. However, Make to Stock (MTS) production type is using demand forecast and build inventory in advance is the traditional mode, expect to meet the customers order. But forecast it's nature is inaccurate. It can cause the high WIP level in production line and high inventory pressure which is harmful to the company. Make to Order (MTO) production type can decrease the WIP and inventory in the warehouse, but it needs the short cycle time to achieve the better order performance. This study is base on MTO and build three experimental scenarios, when production control staff receive the order from customer and then input the quantity the customer need, using small lots and transfer batch skill to reduce cycle time. Base on the selected company H historical data, we compare three performance indices: Work-in-process (WIP) level, cycle time and on time delivery. After the three experiments, the results can prove that using MTO's input and reduce the lot size can gain the better performance then former MTS production way.