A Simulation Method for an Optimal Production Control Policy for an Unreliable Single Machine System

（z, Z）生產控制策略應用在單機台含暫存區製造系統之模擬分析

陳金帶(Chin-Tai Chen) ； 杜志乾(Chih-Chien Tu) ； 阮約翰(John Yuan) ； 林明漢(Ming-Han Lin)

《工業科技與管理學刊》 2卷 (2008/03) Pp. 103-119

https://doi.org/10.6604/JITM.2008.2.6

摘要

本文探討（z, Z）生產控制策略應用在單機台含緩衝區製造系統。（z, Z）生產控制策略為系統中應存在兩個存貨水準z＜Z。假設系統在其起始點（t=0）之存貨水準為零或Z，調控機台生產率至最大生產率r 直到存貨水準達到Z，此時重新調控機台生產率至零直到存貨水準降到z，再重新調控機台生產率為最大生產率r 直到存貨水準提昇到Z，如此反覆循環。透過模擬，我們可以找出在某系統環境下最適用的生產控制策略，以達到降低生產成本的目標。利用renewal process的觀念並結合模擬的方法，估計出單位時間存缺貨成本及得到較佳之目標函式值。

關鍵字

生產控制策略 ； 更新過程 ； 緩衝區

並列摘要

The paper proposed a simulation method to search for an optimal production control policy (z, Z) (z＜Z). Values of the expected inventory cost rate (i.e. expected total cost due to both inventory holding and backlog per unit time) for the (z, Z) production control policy is minimal for a single machine system. The machine is subject to operation-dependent failure only and alternates between normal and failure. A numerical example is presented to illustrate how to estimate the inventory cost rates for various pairs of (z, Z) and how to get the minimal one among them. A numerical example is further used to compare the proposed simulation method (commercial eM-plant software) in terms of both execution times and the inventory cost rate values.

並列關鍵字

production control policy ； renewal process ； buffer