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양정회 대한설비관리학회 1997 대한설비관리학회지 Vol.2 No.1
Technological advances in recent decades have increased the complexity of devices required by industry and service sectors. An important problem associated with such devices is the determination of their reliability in performing the job they are designed to do. A closely related, but more important, problem faced by the practitioner is concerned with the maintenance of such devices. Many preventive maintenance policy have been studied by many ethers, since the replacement and repiar policy at failure was first proposed by R. Barlow and L.Hunter at 1960. This paper represents the guidelines to establish the preventive maintenance policy through reviewing and summarizing the literatures related. The criteria to classify the maintenance models are as follows ; ① replacement time, ② types of repair, ③ the conditions of repair, and ④ types of failure. The categories of preventive maintenance policy are ① failure time-based replacement model, ②failure number-based replacement model, and ③ integrated model of failure time and failure number.
양정회 한국산업경영시스템학회 1994 한국산업경영시스템학회지 Vol.17 No.30
Productivity relates output to input and also integrates performance aspects of quality, efficiency and effectiveness. Productivity improvement are associated with efficiency and effectiveness, productivity index involved quality and flexibility, integrated productivity measurement system, and other factors. This study focused on the productivity improvement that involved the opportunity costs such as qualify costs and flexibility effects.
양정회 한국산업경영시스템학회 1995 한국산업경영시스템학회지 Vol.18 No.34
Many companies have thought that the quality cost is inclosed as the quality is improved. But, this is not so. The quality cost is not monotonously increased in proportion to the quality improvement. The existing approach to quality cost has many problems. This paper deals with conceptual difference between the traditinal and the existing view points of quality cost as the measurement index of quality, and developed the right approach of quality cost in terms of the combination of the traditinal and the existing approach. The right approach of quality cost that proposed in this paper was involved the following results; The approach of quality cost based on the continuous quality improvement for customer satisfaction, and considered flexibility, time, and information when the quality measured and evaluated.
양정회(Jeong-Hoe Yang),임성욱(Sung-Uk Lim) 한국산업경영시스템학회 2004 한국산업경영시스템학회지 Vol.27 No.1
More than three years have passed since Korean companies introduced Six-Sigma. Each company used a lot of quality improvement tools for years. However, the tools have been taught to the companies with a little understanding of Six sigma tools. Therefore, it is difficult to use the tools correctly at appropriate time. This survey paper was conducted on MBBs and BBs of the manufacturing companies that introduced Six-Sigma. It is intended, in this paper, to provide the companies that will be introduce Six-Sigma a guideline of training course and tools by understanding the importance of each DMAIC stage of Six-Sigma, examining the frequently used tools in each process and their performances, and selecting the key tools for each stage based on the result of this survey
朴永宅,梁正會 成均館大學校 科學技術硏究所 1987 論文集 Vol.38 No.1
This study presents a microcomputer program for a facility layout that uses the relationship chart which represents interdepartmental relationships. The program presented here is written in BASIC language. The program uses the following three-stage algorithms: (1) Selection of placement order 1) Select a department having the largest total closeness rating. 2) Search for a department with a interdepartmental interation of the highest closeness rating with the last selected department. If the rating is higher than minimal acceptable closeness rating, return to 2). Otherwise, search for one of the unselected department having the largest total closeness rating, return to 2). (2) Placement pattern Department placement starts at the center of the screen and spirals outward until the layout is established. (3) Layout scoring The distance from each department centroid to the others is multiplied by the corresponding closeness rating and summed to give the total score. The presented algorithm was tailored after that of Gaston, but our algorithm improved the Gaston's as follows: 1) The first selection of a department was based on the total closeness rating instead of random selection. 2) The possible distance measures are rectilinear, euclidean and squared euclidean distances instead of the rectlinear distance alone. 3) Preassigned departments such as aisles, stairwells, etc. can he located in advance.