순방향물류와 역방향물류의 두 물류 체인을 통합해서 자원 순환형 공급체인 (CLSC: closed-loop supply chain) 을 구성하는 것은 기업의 비용절감을 위해서 반드시 필요한 요소이다. 본 연구에서는 순환형 공급체인의 환경에서 순방향물류의 도매점과 역방향물류의 처리센터의 재고를 통합하는 재고관리를 제안한다. JIT(Just-in-Time)배송이 고려된 새로운 CLSC 재고관리모델은, 회수센터에서 처리센터로 배송된 사용이 끝난 제품이 도매업자의 수요에 미치지 못할 때 제조사에게 필요한 제품을 재발주 할 것이지 사용이 끝난 제품의 회수를 기다릴 것이지를 선택함으로써 비용을 절감한다. 제안 모델의 유효성을 검증하기 위하여 최적화 기법중 하나인 유전자 알고리즘(Genetic Algorithm: GA)을 이용하였다. 파라미터가 해에 미치는 영향을 알아보기 위해서 세 가지 파라미터 조건에서 우선 순위형 GA (priority-based GA: priGA)와, 각 세대마다 파라미터가 조정되는 개량형 하이브리드 GA (modified Hybrid Genetic Algorithm: mhGA)를 사이즈가 다른 4가지 수치 예에 적용하여 시뮬레이션을 실시하였다.
It is an element certainly required for the cost reduction of a company that forward and reverse logistics chain are unified and constitutes a resource closed-loop supply chain (CLSC). In this study, the inventory control which unifies inventory of distribution centers (DCs) of forward logistics and processing center of reverse logistics in the CLSC environment is proposed. The inventory system model for newly-constructed CLSC considers the JIT(Just-In-Time) delivery from the processing center to the manufacturer, including the making of decisions on whether to wait for the arrival of end-of-life products or to back-order necessary products for manufacturer when the supply of end-of-life products at the processing center via the returning center is insufficient for the demands of the manufacturers. The validity of the proposed model was verified using the genetic algorithm (GA). In order that a parameter might investigate the effect which it has on a solution, the simulation was carried out for priGA(priority-based GA) on three kinds of parameter conditions. Moreover, mhGA(modified hybrid GA) to which a parameter is adjusted for every Study on Reducing Logistics Costs and Inventory Control System according to facilities integration in the Closed-Loop Supply Chain Environment generation, the simulation was carried out to a four-kind numerical example.
C. K. Park, "A Study on the Effect of Supply Chain Environmental Management on the Corporate Social Responsibility Performances," Korean Journal of Logistics , Vol.19, No.2, pp.41-63, 2011.
G. Kannan, P. Sasikumar and K. Devika,, "A genetic algorithm approach for solving a closed loop supply chain model: a case of battery recycling", Applied mathematical modeling, Vol.34, pp.655-670, 2010.
H. Min, H. J. Ko and B. I. Park, "A lagrangian relaxation heuristic for solving the multi-echelon, multi-commodity, closed loop supply chain network design problem", International journal of logistics system, Vol.1, No.4, pp.382-404, 2005.
J. B. Sheu, Y. Chou and C. Hu, "An integrated logistics operational model for green-supply chain management", Transportation research part E: logistics transport review, Vol.41, No.4, pp.287-313, 2005.
H. Min, C. Ko and H. Ko, "The spatial and temporal consolidation of returned products in a closed-loop supply chain network", Computers and Industrial Engineering, Vol.51, pp.309-320, 2006.
L. Q. Zhao and M. Liu, "Disruption coordination of closed loop supply chain network (i) -models and theorems-", International Journal of Innovative Computing, Information and Control, Vol.4, No.11, pp.2955-2964, 2008.
L. M. Lindu and Q. .Linbo, "Disruption coordination of closed loop supply chain network (ii) - analysis and simulations-", International Journal of Innovative Computing, Information and Control, Vol.5, No.2, pp.511-520, 2009.
M. Fleischmann, P. Beullens, J. M. Bloemhofruwaard and L. Wassenhove, "The impact of product recovery on logistics network design", Production and Operations Management Vol.10, pp.156-173, 2001.
M.Gen, R. Cheng and L. Lin, "Network Models and Optimization: Multiobjective Genetic Algorithm Approach", Springer, London. 2009.
M. Mukuda, Y. Tsujimura and M. Gen, "Optimization of multiobjective system reliability design using FLC -controlled GA". IEEJ Trans EIS, Vol.125, pp.623-630, (in Japanese), 2005.
M. Gen, F. Altiparmak and L. Lin, "A genetic algorithm for two-stage transportation problem using priority-based encoding", OR Spectrum, Vol.28, No.3, pp.337-354, 2006.
K. G. Rhee, Lee, J. E. Lee and K. D. Lee, "Multiobjective Reverse Logistics Model Considering Inventory Systems with Backordering", Korean Journal of Business Administration, Vol.25, No.1, pp.613-625, 2012.