In this paper, we investigate an inventory and production system in a three-layer supply chain system involving a single supplier, single manufacturer and multiple retailers. Earlier study in this type of supply chain only consider a single raw material in order to produce single item, but we consider raw materials in order to produce multiple items. It is assumed that the cycle time at each stage is an integer multiple of the adjacent downstream stage. We develop an iterative solution procedure to find the order quantity for the multiple items and raw materials that minimizes the supply chain-wide total cost per unit time of the supplier and manufacturer’s raw materials ordering and holding, setup and finished items holding, the retailer’s ordering and inventory holding. Numerical examples are presented to show that the proposed heuristic gives good performance.

1. 서 론
 2. 분석적 모형
  2.1 기호정의
  2.2 기본가정
  2.3 통합총비용의 유도 및 분석
 3. 반복적 해법
 4. 통합재고모형의 예제
  4.1 수치 예 1-단일완제품인 경우
  4.2 수치 예 2-복수완제품인 경우
 5. 통합재고모형의 타당성 검토
  5.1 품목별로 독립발주정책을 정하는 경우
  5.2 모두 동일한 주기로 발주하는 경우
  5.3 재고정책간의 비교
 6. 결 론
 Acknowledgement
 References

• 김대홍(한성대학교 산업경영공학과) | Dae-Hong Kim Corresponding Author