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金重純 啓明大學校 産業技術硏究所 1983 産業技術硏究所 論文報告集 Vol.4 No.-
This paper deals with the application of reliability programming to the aggregate Production planning. In this study, the Linear Decision Rule (LDR) model is used and the demand variable is assumed to have a normal distribution with mean μand standard deviation α. The LDR model is transformed into reliability programming. The objective function of reliability programming is solved using the kuhn-Tucker conditions. In the Kuhn-Tucker necessary conditions, the work force level is solved making use of the linear second order difference equations.
FMS의 工作機械 臺數 결정 및 負荷割當에 관한 발견적 기법
김중순 啓明大學校 産業技術硏究所 1992 産業技術硏究所 論文報告集 Vol.15 No.1
This paper proposes four heuristic algorithms for determining the number of machines and machine loading in FMS. The problem may be regarded as a Bin Packing problem with two kinds of capacity constraints. Capacity constraints are tool magazine capacity and available production time capacity. Mathematical formulation of the problem is described. Four heuristic algorithms used are First Fit, Best Fit, First Fit Decreasing, Best Fit Decreasing. Computaional results for six case problems are given and heuristics are compared with respect to the number of machines.
金重純 啓明大學校 産業技術硏究所 1989 産業技術硏究所 論文報告集 Vol.11 No.-
This paper is motivated by the observation that the Japanese have devoted much time and energy to decreasing setup costs in their manufacturing processes and that there has been little in the way of a formal framework available to use to think about such efforts. This paper deals with a framework for studying the trade-offs associated with decreasing the setup costs in the multiproduct capacitated model. By reducing the time required for setups, that time can be used to reduce lot sizes. Numerical examples illustrate the results.
金重純 啓明大學校 産業技術硏究所 1983 産業技術硏究所 論文報告集 Vol.5 No.-
This paper deals with the determination of the contract lead time. The lead time is the time between customer's placing an order and deliverly. The objective is to minimize the expected aggregate cost per job order according to the contract lead time. The aggregate cost consists of, 1) due-date cost which occurs when the contract lead time is very long, 2)tardiness cost which occurs when we delivered the finished goods after the due date, 3) earliness cost which has relation to inventory holding costs when the finished goods can't be delivered at the moment of completion. All the cost functions are assumed to be linear. I assume that all job orders arrive at the shop according to a poisson distribution with the mean λ and that the actual production time is exponentially distributed with the mean 1/ μ. And I assume that the number of the production line is S. The Optimal solution of this problem is solved by trial and error. It is shown that the optimal lead time is a unique minimum point of strictly convex functions.
金重純 啓明大學校 産業技術硏究所 1986 産業技術硏究所 論文報告集 Vol.8 No.-
A method for the consideration of learning effects in EPQ model with backorders is presented. The optimum values of Economic Production Quantity and maximum Backorder level permitted are found by solving two simultaneous equations. The partial derivatives of economic production quantity function and maximum backorder level function with respect to several parameters are found. Several parameters are demand rate in units per year, production rate in units per year, the slope parameter of the learning curve, annual inventory carrying cost rate, backorder cost per unit short per year, production set-up cost, and current cummulative production quantity. This paper concludes that the method for the consideration of learning effects is better than the solution for the conventional EPQ model within a labor-intensive production system.
김중순 계명대학교 산업기술연구소 1992 産業技術硏究所 論文報告集 Vol.15 No.2
This paper presents an overall review of the literature available on production scheduling problems for flexible flow lines. Many of the real life production systems have the system configuration of flexible flow lines and the research on this area is really challenging from the application point of view. Therefore a review of the literature on production scheduling problems for flexible flow lines facilitates the scope for future research and its applications. The literature available has been suitably classified based on scheduling hierarchy and briefly discussed under approriate classification. The deficiency of the existing literature is reported and future research problems are identified with the aim of modelling these systems more realistically and to suggest future research directions for modelling and solving such complex problems.
스터터링 포아손 分布下에서의 서어비스 水準 결정에 관한 硏究
金重純 계명대학교 산업기술연구소 1984 産業技術硏究所 論文報告集 Vol.6 No.-
This paper deals with the determination of the service level and reorder points when lumpy demand patterns with highly skewed distributions are prevalent. Lumpy demand patterns are common in maintenance parts and supplies types of stockholdings. The objective is to minimize the expected inventory relevant costs according to the service level when recorder points is not given. Inventory relevant costs consist of buffer stock holding cost and the expected shortage costs. Lumpy demand is assumed to have a Stuttering Poisson distribution. Inventory control policy is fixed reorder quantity system with continuous review. Reorder quantity is given by the classical E.O.Q. formula. Lead time is assumed to be known and constant. A simple example is given for the purpose of explaining the methodology.