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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean society for quality management
Journal Basic Information
Journal DOI :
The Korean Society for Quality Management
Editor in Chief :
Volume & Issues
Volume 28, Issue 4 - Dec 2000
Volume 28, Issue 3 - Sep 2000
Volume 28, Issue 2 - Jun 2000
Volume 28, Issue 1 - Mar 2000
Selecting the target year
Bayesian Hypotheses Testing for the Weibull Lifetime Data
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 1~10
In this paper, we address the Bayesian hypotheses testing for the comparison of Weibull distributions. In Bayesian testing problem, conventional Bayes factors can not typically accommodate the use of noninformative priors which are Improper and are defined only up to arbitrary constants. To overcome such problem, we use the recently proposed hypotheses testing criterion called the intrinsic Bayes factor. We derive the arithmetic and median intrinsic Bayes factors for the comparison of Weibull lifetime model and we use these results to analyze real data sets.
Preventive Replacement Policy with the Number of General Repairs
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 11~17
This paper presents a model for determining the optimal number of general repairs and supplementary input cost limit rate in addition to minimal repair cost rate to implement preventive maintenance. The basic concept parallels the periodic replacement model with minimal repair at failure introduced by Barlow and Hunter(1960) and Park(1979), only difference being the replacement signalled by the number of previous general repairs performed on the system. A general repair brings the state of the system to a certain better state than before repaired. Numerical examples are provided.
An Economic Design of
Control Charts with Variable Sample Size and Sampling Interval
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 18~30
Recent studies have shown that the
chart with variable sampling intervals(VSI) and the
chart with variable sample size(VSS) are much quicker than Shewhart
chart in detecting shiks in the process. Shewhart
chart has been beneficial to detect large shifts but it is hard to apply Shewhart
chart in detecting moderate shifts in the process mean. In this article the
chart using variable sample size(VSS) and variable sampling Intervals(VSI) has been proposed to supplement the weak point mentioned above. So the purpose of this paper is to consider finding the design parameters which minimize expected loss costs for unit process time and measure the performance of VSSI(variable sample size and sampling interval)
chart. It is important that assignable causes be detected to maintain the process controlled. This paper has been studied under the assumption that one cycle is from starting of the process to eliminating the assignable causes in the process. The other purpose of this article is to represent the expected loss costs in one cycle with three process parameters(sample size, sampling interval and control limits) function and find the three parameters.
A Study on the influence of Service Quality Factors upon the Customer Satisfaction - Focus on Gas Station Service Quality -
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 31~43
The Service sector has increased dramatically in importance over the last decade, both internationally and in the Korea. Deregulation of services, growing competition, fluctuations in high quality demand, and the application of the Information Technologies are presenting a considerable challenge to service companies. In gas or oil companies are exposed to foreign competitions, price and promotion competition with other companies. Usually Service Quality includes five dimensions: Reliability, Responsiveness, Assurance, Empathy, and Tangibles. Customers use these five dimensions to form their judgements of service quality, which are based on a comparison between expected and perceived service. The intention of this thesis is to study on the effect of Service Quality upon the Customer Satisfaction in gas or oil station, based on SERVQUAL.
The Statistical Design of VSS
Chart Considering Two Assignable Causes
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 44~52
In this paper we apply VSS X chart to the case when two assignable causes effect the process mean shift. We compare the case when two compound assignable causes effect the process mean with another one which effects individually. For the practical use of VSS
chart we propose the sample size which minimizes the average number of samples until the signal is given in out-of-control state.
Optimal Age Replacement Policy for a Repairable System with Increasing Minimal Repair Times at Failure
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 53~58
In many cases, it is more practical and economical to repair a system than to replace the whole system or to perform a complete overhaul when it fails. The age replacement policy with minimal repair at failure is considered. The system is replaced every time its age reaches at
. For each intervening failure only minimal repair is done. The minimal repair times in a renewal period are increasing in the sense that the minimal repair times constitute a strictly increasing geometric process. The long-run expected cost rate Is obtained and the properties of the existence and the uniqueness of the optimal policy minimizing the long-run expected cost rate are derived.
Testing on the Existence of Interaction Effects in
Resolution IV Factorial Experiments
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 59~67
In analysis of resolution IV fractional factorial experiments, the main effects only are analyzed, even though we can get some useful information on the confounded 2-factor interactions. In this paper, we introduce an exploiting method of the confounded structure of interactions, especially for the near minimal resolution IV 3
fractional factorial designs developed by Anderson and Thomas (1979). Moreover, in this paper the application way of the proposed method is also discussed by analyzing some simulated data.
An Empirical Study on Factors for Effective Total Quality Management Education
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 68~81
In this paper, we studied the four stages of quality related education and training and identified alignment factors that have influence on successful TQM education and training. Based on extensive literature reviews the four stages are extracted such as quality concepts training, quality tools training, special topics training, and leadership training. Also we determine the alignment factors. A framewok of research model including above factors is developed and tested statistically. The perceived data are collected from managers of quality departments of 140 Korean firms through survey. The results show that alignment factors which achieve success in Quality related education training are using relevant examples and implementing training at the top in quality concepts training, providing time and opportunity to master skills in quality tools training, organizing courses into a logical curriculum in special topics training, and providing ongoing feedback in leadership training. We also offered numerous suggestions that can help organizations develop effective training programs to meet their objectives.
A Comparative Study on the Characteristics of Malcolm Baldrige National Quality Award and Japanese Quality Award
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 82~90
MBNQA(Malcolm Baldrige National Quality Award) was established in 1987 in order to promote the spread of TQM in U.S. Likewise, JQA(Japanese Quality Award) was set up in 1995 in order to upgrade the level of TQM activities in Japan. MBNQA and JQA are quite the same in their basic concepts, values, and the process of the examination, but they differ in the contents of the criteria. The objective of this study is to Identify the differences between MBNQA and JQA in terms of strategy planning category, Therefore, in this paper, strategy planning category is analyzed, especially its theoretical validity is examined by literature review. The major differences are as follows: JQA emphasizes strongly the evaluation process than MBNQA by requiring the measuring of the level of strategic achievement. On the other hand, in MBNQA, strategic objectives must be estimated by decision analysts techniques, scenario tools, and other statistical methodologies.
Development of Improved Process Allocation Method in Process Industry
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 91~103
It is very important to rationally allocate manufacturing processes because customer's needs are being various, and product life cycle in the market Is being shortened. The process allocation is needed before making process control plan and is mostly being done by the field experience or intuition of machine operator, process engineer and/or maintenance technician. Therefore, a modified allocation method using the process variation is proposed. This paper presents the result of comparative studies between current method and the proposed one.
Development of Quality Document Management System Using Hypertext
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 104~113
In this paper, we present a useful system to manage the quality documents, using the concept of hypertext in HANGUEL wordprocessor, In order to develop this system, we classify all manuals, procedures and forms into files. A relationship chart of these files is constructed and files are hyperlinked according to this chart. We apply this quality document management system using hyper- text to a small precision manufacturing firm by analyzing its all kinds of quality documents. We confirm that this system effectively reduces the handling time of quality documents and supports revising task of quality documents with consistency.
Six Sigma and Statistics
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 114~123
Six Sigma has been adopted as a major improvement initiative by some leading Korean companies. The paradigm of how statistics is to be applied in business and industry has been challenged by Six Sigma. In this paper, Six Sigma initiative and its importance are stressed. Also statistical thinking plays a major role in Six Sigma. Therefore, its relationship with Six Sigma is explained. Next, various strategies for achieving Six Sigma are reviewed. Finally the strategy that GE takes for achieving Six Sigma is examined.
A Study on a Standardized Scoring System of Selected Subjects for College Entrance Examination
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 124~132
A selected subject and a standardized scoring system were newly enforced at college entrance examination from 1999. A selected subject system means each student can select one subject in addition to common subject in the field of mathematical research II and a standardized scoring system means we standardize the score of each field as mean 50 and standard deviation 10 in order to adjust the degree of difficulty between fields. In the field of mathematical research II, there may exist not only difference of the degree of difficulty but also that of general studying ability between groups of selected subjects. So when we standardize score, we have to consider them. So far a linear equating which is a parametric method and an equi-percentile equating which is a nonparametric method have been published, but both of them supposed that the general studying ability between groups was equal. So in this paper an adjusted linear and percentile equating method which seems to be adequate to our entrance examination is suggested and is investigated by computer simulation.
e-CRM Strategy based on Customer Purchasing Activity
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 133~144
Many organizations have developed their own information systems not only for internal efficiency but also for effectiveness of external customer services. One of the most effective service tools for their customers is the use of information technology. The web technology is rapidly becoming one of the most effective tools for online customer services. In order to gain competitive edge, organizations must have effective web site planning methods for their customer service. A study on traditional information systems planning methodologies has been conducted and they are compared with web site planning techniques. Cases of web sites in order to Improve customer relationship are analyzed. finally, a new conceptual framework for web site planning strategy for e-CRM is proposed in this paper. In order to support effective web site planning, online customer contact points and online service activities are defined and classified as several stages. And, web site strategies corresponding to each customer service activities are developed and proposed, With this framework, organizations can build competitive web strategies for improving their online customer relationships, thereby increasing customer satisfaction.
Path Analysis and SERVQUAL for Knowledge Quality Improvement
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 145~154
Effective management of knowledge is essential to keep up with demands of this challenging information age. The first step for this kind of management would be to define indicators to evaluate the quality of knowledge. In this paper, we use five latent variables (intrinsic quality, representational quality, ease of use of quality, maintainable quality, usage of quality) as basis for a preliminary path analysis for knowledge management. Preliminary study results showed that high intrinsic quality does not necessarily guarantee high frequency of use. A modified questionnaire is made and is used for SERVQUAL. The result of SERVQUAL shows that customers are not relatively happy about both intrinsic quality and its ease of use. Additional path analyses are done for both expected and observed quality indicators. The path model based on the expectation indicated that the presentation method of knowledge would induce its easy maintenance while that based on observation did not back up the same phenomenon.
Determination of Optimum Process Mean and Screening Limit for a Production Process Based on Two Correlated Variables
Journal of the Korean society for quality management, volume 28, issue 3, 2000, Pages 155~164
This paper considers the problem of determining the optimum proccss mean value of the quality characteristic of interest, and the screening limit for two correlated variables under single-stage screening. In the single-stage screening, inspection is performed on two correlated variables which are correlated with the quality characteristic of interest. Model is constructed which involves selling price, production, inspection, and penalty costs. Method for finding the optimum process mean and screening limit are presented when the quality characteristic of interest and the correlated variables are assumed to be jointly normally distributed. A numerical example is presented and numerical analysis is performed to compare the proposed screening based on two screening variables with screening based on one screening variable.