부품 판매 사업이 완성품 제조 기업의 두 단계 공급망 운영 전략에 미치는 영향 분석 (The Impact of Component Sales Business on the Two-Stage Supply Chain Operations Strategy of an End-Product Manufacturing Company)

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초록

We study a joint end-item production scheduling, production capacity rationing, and order admission for a manufacturingcompany with component and end-item production facilities. Recently, due to the importance of component marker in themanufacturing industry, the after-sales market expansion, and the increased risk in the component supply chain, thecomponent supply chain management has received an attention from the literature. In this paper, the component productionfacility operates a make-to-stock production for the internal inventory replenishment and a make-to-order production for theexternal order from the market, which generates a capacity rationing problem. We presented a Markov decision processmodel to investigate the impact of end-item production scheduling, production capacity rationing, and component orderadmission controls on the company’s profit. Numerical study, using the value iteration algorithm, indicates that thecomponent production capacity rationing is heavily affected by all three type of inventory levels, and the optimal admissioncontrol tends to accept an incoming component order if the sum of end-product and component inventory levels reaches ata threshold. It also indicates that the optimal end-product production control will be insensitive to the component inventorylevel beyond its certain value. We numerically compare the performance of the optimal policy and the fixed thresholdpolicy widely used in the production literature. The results show that the performance of the fixed threshold policy will besensitive to system parameter values and the average percentage performance difference between the two policies willsignificantly vary.

영어초록

We study a joint end-item production scheduling, production capacity rationing, and order admission for a manufacturingcompany with component and end-item production facilities. Recently, due to the importance of component marker in themanufacturing industry, the after-sales market expansion, and the increased risk in the component supply chain, thecomponent supply chain management has received an attention from the literature. In this paper, the component productionfacility operates a make-to-stock production for the internal inventory replenishment and a make-to-order production for theexternal order from the market, which generates a capacity rationing problem. We presented a Markov decision processmodel to investigate the impact of end-item production scheduling, production capacity rationing, and component orderadmission controls on the company’s profit. Numerical study, using the value iteration algorithm, indicates that thecomponent production capacity rationing is heavily affected by all three type of inventory levels, and the optimal admissioncontrol tends to accept an incoming component order if the sum of end-product and component inventory levels reaches ata threshold. It also indicates that the optimal end-product production control will be insensitive to the component inventorylevel beyond its certain value. We numerically compare the performance of the optimal policy and the fixed thresholdpolicy widely used in the production literature. The results show that the performance of the fixed threshold policy will besensitive to system parameter values and the average percentage performance difference between the two policies willsignificantly vary.

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