全球供應鏈不確定性對企業經濟生產批量之影響研析

An Analysis of Influence of Global Supply Chain Uncertainty to Business Economic Production Lot

曾惠珠(Hui-Chu Tseng)

《興國學報》 11期 (2010/01) Pp. 149-162

https://doi.org/10.29950/JHKUM.201001.0010

摘要

本研究主要探討不確定性對經濟生產批量之影響，依據經濟生產批量的架構，假設生產過程為一不確定性的瓶頸生產存貨系統，針對經濟生產批量之生產期間與非生產期間之機器損壞模式進行分析探討。探討EPQ模型包含：（1）生產期間機器損壞之模型；（2）非生產期間機器損壞之模型。本研究主要結論：（一）當機器損壞時間(μ)越長，生產批量會跟著下降。亦即dry period逐漸增加時生產批量呈現遞減的狀況，因此dry period對於生產系統是有其顯著之影響。（二）當機器損壞時間（μ）越長，期望總成本會跟著上升。亦即dry period逐漸增加時期望總成本呈現遞增的狀況，因此dry period對於生產系統是有其顯著之影響。（三）隨著利用率的增加，生產批量Qcase1呈現遞增的狀況，因此利用率對於生產系統是有其顯著之影響。（四）在參數相同之下，生產批量Qcase2不會因為年需求、設置成本與持有成本之改變而產生遞減之變化。（五）當wet period（λ）與dry period（μ）兩者之比例達2比1時，此時為最佳生產批量。

關鍵字

全球供應鏈 ； 不確定性 ； 經濟生產

並列摘要

This research main discussion uncertainty to influence of the economic production batch, the basis economic production batch's construction, the supposition production process is an uncertainty bottleneck production goods in stock system, production of period in view of economic production batch carries on the analysis discussion machine of damage pattern with the non-production period. Discusses the EPQ model to include: model of the (1) production period machine damage; model of the (2) non-production period machine damage. This research main conclusion: (1) when the machine damage time (Mu) is longer, the production lot with will be dropping. I.e. dry period increases gradually when the production lot presents decreasing progressively the condition, therefore dry period has its remarkable influence regarding the production system. (2) when the machine damage time (Mu) is longer, expected that the total cost with will be rising. I.e. dry period presents the increasing by the increasing overtime expectation total cost the condition, therefore dry period has its remarkable influence regarding the production system. (3) along with use factor increase, production lot Qcase1 presents the increasing the condition, therefore the use factor has its remarkable influence regarding the production system. (4) under the parameter is the same, production lot Qcase2 not because the year demand, the establishment cost with will have change of the cost to have change of the decreasing progressively. (5) when wet period (Lamda) (Mu) both the proportion reaches 2:1 with dry period, this time for best production lot.

並列關鍵字

Uncertainty ； Supplies the chain ； Economic production

參考文獻

Barrionuevo, A., and Deutsch, C. H., “A distribution system brought to its knees,”New York Times, Sep. 1, p. C1., (2005).

Greenhouse, S., “Both sides see gains in deal to end port labor dispute,” New York Times, Nov. 25, p. A14., (2002).

Berk, E.,Arreola-Risa, A.(1994).Future supply uncertainty in EOQ models.Naval Research Logistics.41,129-132.

Chiu, S. W.,Wang, S. L.,Chiu, Y. P.(2006).Determining the optimal run time for EPQ model with scrap, rework, and stochastic breakdowns.European Journal of Operational Research.180,664-676.

Chiu, Y. P.(2003).Determining the optimal lot size for the finite production model with random defective rate, the rework process, and backlogging.Engineering Optimization.35,427-437.