Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Korean Management Science Review
Journal Basic Information
Journal DOI :
The Korean Operations and Management Science Society
Editor in Chief :
Volume & Issues
Volume 11, Issue 3 - Oct 1994
Volume 11, Issue 2 - Jun 1994
Volume 11, Issue 1 - Mar 1994
Selecting the target year
A simulation code generator for AGVS design
Korean Management Science Review, volume 11, issue 1, 1994, Pages 1~21
We usually use the simulation technique in the evaluation and the test of a design alternative of Automated Guided Vehicle System. In this paper, we introduce a simulation code generator which can assist simulation programmer in model development and programming. It consists of user interface, program editor, and program sorter. SIMAN is used as the target language.
A strategic operating model of AGVs in a flexible machining and assembly system
Korean Management Science Review, volume 11, issue 1, 1994, Pages 23~37
This paper discusses the methodology for the operational performance of unit-load automated guided vehicles(AGVs) in a flow-shop-type flexible machining and assembly systems (FM/AS). Throughout the paper, AGVs are working as a carrier and mobile workstation. For a double-loop FM/AS, in which one loop is dedicated to machining and the other to assembly, three AGV operating strategies are proposed. Considering the entering interval and travel time of AGVs between workcenters, the strategies are developed to determine the best job sequence which minimizes the makespan and vehicle idle time. Entering times of AGVs and the required minimum number of AGVs are obtained on the basis of the best job sequence. When the number of AGVs are limited, entering times of AGVs are adjusted to maximize the utilization of AGVs
Analytical model for the throughput capacity of single carousel
Korean Management Science Review, volume 11, issue 1, 1994, Pages 39~50
Carousel systems can be classified into unidirectional and bidirectional carousel, depending on the hardware structure. Bidirectional carousels again can be classified into reversible and irreversible carousel, depending on whether the reversal of direction is allowed or not during the process of an order. In this study, single carousel served by one operator is considered. Analytical models for the rotation distance to process an order of size are developed for unidirectional and irreversible bidirectional cases. For reversible bidirectional and Nearest Neighbor Heuristic cases, simulation results of the average rotation distance are presented. Since the throughput capacity of carousel systems also depends upon the picking time of the operator; order size; and the rotation speed of carousel, the model considers the above three factors to express the throughput capacity of single carousel systems.
Sensitivity analysis of the transportation problem
Korean Management Science Review, volume 11, issue 1, 1994, Pages 51~58
The purpose of this study is to extend the current sensitivity analysis of the transportation problem. In this paper we present a systematic method to obtain the variation range of supplies or demands by introducing a dummy column or dummy row. By using this approach we can deal with the case of fixed demands, and the unbalanced problem that the total demand is greater than the total supply.
A spreadsheet modeling for network analysis
Korean Management Science Review, volume 11, issue 1, 1994, Pages 59~72
In this paper we examine potentials of a spreadsheet program, one of the most widly available software system, as a mathematical optimization modeling tool. For an illustrative example, a shortest path problem is modeled on Lotus-123 for practical use and an implementational framework and a general guide to the spreadsheet modeling of network analysis is provided.
A Study on DRP System for Logistics Improvement - A Case of a Multi-sourcing Logistics System
Korean Management Science Review, volume 11, issue 1, 1994, Pages 73~90
Recently the recongnition of Logistics becomes important to enterpries as a means for improving their competition, but the Korea enterpries falls for far behind in management techniques for analyzing realities and problems in the Logistics compare to the advanced countries. Especially the function of inventory control which is most undeveloped in them should be improved in Korea. Inventory is very important in Logistics, but there exists trade-off between inventory level and customer in the service level. It is difficult to coordinate both the reduction in the inventory level and the enhancement in the service level. Its effective technique is a DRP system. In general, it deals with arborescent distribution network in which a given channel member has a single source of supply. This article aims to present a DRP system, and more a DRP system which is flexible and responsive in the multisourcing, multi-echelon distribution network. Related research issues are discussed. Finally, using a DRP system on logistics and the management performance. So we can help the physical distribution improvement of the Korean enterprises.
Sequencing for a mixed model assembly line in just-in-time production system
Korean Management Science Review, volume 11, issue 1, 1994, Pages 91~106
In mixed model assembly lines, products are assembled seqeuntially that have different combination of options specified by customers. In just in time (JIT) environment, production smoothing becomes an important issue for sub-lines which supply the necessary parts to each workstation of the assembly line. Another important issue is to avoid line stopping caused by work overload in workstations. To find a sequence which minimizes the costs associated with line stoppage and the option parts inventory level, a nonlinear mixed integer programming is formulated. Recognizing the limit of the Branch and Bound technique in large sized problems, a heuristic solution procedure is proposed. The performance of the heuristic is compared with the Branch and Bound technique through randomly generated test problems. The computational results indicate that on the average the heuristic solutions deviate approximately 3.6% from the optimal solutions.
Stochastic ordering of kanban systems with serial stages
Korean Management Science Review, volume 11, issue 1, 1994, Pages 107~115
Stochastic manufacturing systems are generally formulated as performance models of discrete event systems. In this paper, logical models(as opposed to performance models) of kanban systems are presented which are deterministic and untimed but not stochastic and timed. As a result, the first and second order properties of kanban systems are showed which can be fruitfully applied to the analysis and design of kanban systems.
A case study on RAM analysis for a military full-tracked armored vehicle using a statistical method
Korean Management Science Review, volume 11, issue 1, 1994, Pages 117~128
This paper describes a case study on the analysis of RAM(Reliability, Availability, and Maintainability) factors obtained from the Endurance-Test for a military full-tracked armored vehicle. In analysing RAM factors of the vehicle we used such a statistical technique as method of Maximum-Likelihood for estimating parameters.
A development and classification of B-ISDN application services
Korean Management Science Review, volume 11, issue 1, 1994, Pages 129~144
B-ISDN(Broadband Integrated Services Digital Network)which is defined as a service or system requiring transmission channels capable of supporting rates above 1.5 Mbps has emerged as a new future telecommunication infrastructure. B-ISDN can integrate a wide range of services and the success of B-ISDN is crucially dependent on the development of user-needing application services. The purpose of this study is the conceptual development of B-ISDN application services. We survey on the kinds of B-ISDN service, classify application areas by user groups, and develop B-ISDN application services. Finally we categorize B-ISDN application services by their application areas and necessary services.
Optimal policies for batch control operations in Information Systems
Korean Management Science Review, volume 11, issue 1, 1994, Pages 145~163
For an Information System to be successful the continual control of the database system(DBS) is very important. In general, such control operations are performed periodically in batches, even in real time systems. We explain DBS related such control operations and describe the decision problem in each of them. Specifically, backup, checkpointing, reorganization, and batch update operations are considered. Then we develop a general model of the batch backup situation to determine the optimal backup timing. Other operations are considered as special cases of the general batch backup operation are derived and compared. We show that, in general, the control limit policy is superior to the fixed time interval policy in terms of the long-run average cost per unit time. Some practical considerations about the implementation of optimal policies are also mentioned.
Effective management of end-user computing based on its dimensions
Korean Management Science Review, volume 11, issue 1, 1994, Pages 165~186
The increasing importance of end-user computing(EUC) is reflected in the proliferation of academic and practitioner literature on the subject. However, much of this literature assumes widely differing dimensions of EUC, which tends to make many researchers suggest different success factors for managing EUC. Moreover, the variables regarding EUC management have been considerably restricted in previous research. In order to overcome these problems, this study focuses on identifying EUC dimensions theoretically and deriving generic variables representing the mode of EUC management by factor analysis first. Then, based on these EUC dimensions and generic variables for EUC management, effective ways of managing EUC are hypothesized and tested empirically through a mail survey of end-users in 83 Korean business organizations. The results suggest that effective management of EUC should be different depending upon which dimension more importance is attached to in implementing EUC.
Failure analysis of the T-S-T switch network
Lee, Kang-Won ;
Korean Management Science Review, volume 11, issue 1, 1994, Pages 187~196
Time-Space-Time(T-S-T) switching network is modeled as a graceful degrading system. Call blocking probability is defined as a measure of performance. Several performance related measures are suggested under the presence of failure. An optimization model is proposed, which determines optimal values of system parameters of the switching network.