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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Korean Institute of Industrial Engineers
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Journal DOI :
Korean Institute of Industrial Engineers
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Volume & Issues
Volume 15, Issue 2 - Dec 1989
Volume 15, Issue 1 - Jun 1989
Selecting the target year
A Study on the Basic Cyclic Scheduling Problem
Park, S.H. ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 1~10
This paper deals with a single-facility multiproduction model concerning the basic cyclic scheduling. The aim is to obtain the production order of each product in a cycle and the cycle frequency for minimizing the setup costs and inventory carrying costs of all products. The problem is formulated by LP and it shows that the optimal solution derived dominates the solution of non-cyclic scheduling model on some conditions.
Parallel Machine Scheduling with an Aid of Network Flow Model
Chung, Nam-Kee ; Park, Hyung-Kyu ; Yang, Won-Sub ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 11~22
The problem of scheduling n-jobs on m-uniform parallel machines is considered, in which each job has a release time, a deadline, and a processing requirement. The job processing requirements are allocated to the machines so that the maximum of the load differences between time periods is minimized. Based on Federgruen's maximum flow network model to find a feasible schedule, a polynomially bounded algorithm is developed. An example to show the effectiveness of our algorithm is presented.
Analysis of Non-linear Quantity Discount for Heterogeneous Characteristics
Lee, Kyung-Keun ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 23~31
From the supplier's point of view, we examine the existence of a Pareto superior pricing schedule for one wholesaler with multiple retailers. In the case of multiple retailers, an order quantity pricing schedule should depends on the retailer's underlying characteristics. But identification of each retailer's characteristics may be impossible; rather, the wholesaler knows only the probability distribution of each retailer's characteristics. Perfect price discrimination is impossible because a separate pricing schedule cannot be tailored for each retailer. Some degree of discrimination is possible only by using a non-linear pricing schedule. From this analysis based on the non-linear pricing, we conclude that there is no Pareto superior pricing schedule for the case of multiple retailers.
Relative Risk Aversion and Stochastic-Statistical Dominance
Lee, Dae-Joo ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 33~44
This paper presents stochastic-statistical dominance rules which eliminate dominated alternatives thereby reduce the number of satisficing alternatives to a manageable size so that the decision maker can choose the best alternative among them when neither the utility function nor the probability distribution of outcomes is exactly known. Specifically, it is assumed that only the characteristics of the utility function and the value function are known. Also, it is assumed that prior probabilities of the mutually exclusive states of nature are not known, but their relative bounds are known. First, the notion of relative risk aversion is used to describe the decision maker's attitude toward risk, which is defined with the acknowledgement that the utility function of the decision maker is a composite function of a cardinal value function and a utility function with-respect to the value function. Then, stochastic-statistical dominance rules are developed to screen out dominated alternatives according to the decision maker's attitude toward risk represented in the form of the measure of relative risk aversion.
An Automated Process Selection and Sequencing Method in Computer-Aided Process Planning
Cho, Kyu-Kab ; Kim, In-Ho ; Rho, Hyung-Min ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 45~55
This paper deals with development of a computer-aided process selection and sequencing technique and its software for metal cutting processes of rotational parts. The process selection procedure consists of selection for proper machining operations and machine tools suitable for the selected operations. Machining operations are selected based on machining surface features and machine tools are selected by employing a conversion table which converts machining operations into machine tools. The process sequence is determined by the proper manipulation of the precedence relation matrix. A computer program for the proposed technique is developed by using Turbo-Pascal on IBM PC/AT compatible system. The proposed technique works well to real problems.
Economic Selection of Specification Limits for a Given Target Value
Riew, Moon-Charn ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 57~64
An Economic selection of specification limits is considered for a given target value in a complete inspection plan. Each item is inspected, and if it meets the specification, it is accepted. Items less than the lower specification limit are scrapped or sold at a reduced price, and those greater than the upper specification limit are reworked. Cost factors to be considered are economic loss caused by quality deviations, rework cost and scrapping cost. Methods for finding the optimal specification limits are given for the cases of piecewise linear loss function and quadratic loss function with illustrative examples.
A Comparison of Software Reliability Models
Jun, Chi-Hyuck ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 65~75
A general software reliability model is developed, which includes the Jelinski-Moranda model, the Goel-Okumoto model, the Shanthikumar model and the Ross model as special cases. In each of above models estimators of the software failure rate and the number of remaining errors are presented and compared in terms of the expected absolute error loss and the expected squared error loss by a Monte Carlo simulation.
A Bit of Factory Automation : Manufacturing Cost Estimation Using Group Technology
Lee, Sung-Youl ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 77~86
A fully automated cost estimation system(FACES) has been developed. Since speed, accuracy, and consistency are essential factors in automating a cost estimation, the use of computers in cost estimation system(CES) has grown rapidly in the last few years. FACES is a micro computer based cost estimation system that employs a manufacturing knowledge base. A Group Technology(GT) based part classification and coding(C&C) scheme is used to automate the process planning aspects of cost estimation. Variant process planning methods are employed to generate workstation routings from form features of the part. The system has been tested for an assembly of six machined parts. Results indicate that the system could provide a substantial improvement in accuracy, productivity, and performance over the more traditional full dialog approach to cost estimation. It also provides a good foundation for a factory automation by using a common GT based database through design to production.
Optimal Preventive Maintenance Policy for Products Sold Under Warranty
Chun, Young-Ho ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 87~91
A warranty is a contractual obligation incurred by a producer in connection with the sale of a product. The warranty specifies that producer agrees to remedy certain failures in the product sold. There have been many articles dealing with warranties, but they have studied about optimal warranty cost for the warranty period. In this study, an optimal preventive maintenance time interval is computed. The optimal preventive maintenance time interval minimizing warranty cost for the warranty period is discussed. It is assumed that failure rate is increasing and the failure rate after preventive maintenance or corrective maintenance lies between good as new and bad as old.
Machine Repair Problem in Multistage Systems
Park, Young-Taek ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 93~101
The classic machine repair problem is extended to the case where a number of different machines are arranged in the sequence of operation. The steady-state availability of the system with a series of operating machines is maximized under some constraints such as total cost, available space. In order to find the optimal numbers of spare units and repair channels for each operating machine, the problem is formulated as non-linear integer programming(NLIP) problem and an efficient algorithm, which is a natural extension of the new Lawler-Bell algorithm of Sasaki et al., is used to solve the NLIP problem. A numerical example is given to illustrate the algorithm.
Theoretical Basis of PERT Formula and a New Estimation Method
Kim, Se-Hun ; Won, Y.K. ; Chae, Kyung-C. ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 103~108
PERT formulae for the mean and variance of activity time are near exact only over a short interval of the concentration parameter which is defined as the sum of the two shape parameters of the beta distribution. Aiming a better estimation of the mean and variance of activity time, we propose a method of subjectively estimating this concentration parameter via estimating the probability of completing the activity within a specified time interval.
A Study on the Capaciated Production Lot Sizing Problem with Probabilistic Demand
Kim, Man-Sik ; Lee, Ho-Il ;
Journal of Korean Institute of Industrial Engineers, volume 15, issue 2, 1989, Pages 109~116
In many cases, production-inventory systems involves significant demand variations. Actual demand is probabilistic and the production capacity is also limited. Finding the proper production lot sizes to this problem usually requires heavy computational procedures. Therefore a heuristic approach were under various assumptions is highly recommended. In this paper, an approach with consideration of probabilistic demand and limited production capacity is proposed.