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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 27, Issue 4 - Dec 1999
Volume 27, Issue 3 - Sep 1999
Volume 27, Issue 2 - Jun 1999
Volume 27, Issue 1 - Mar 1999
Selecting the target year
A Study on the Impact of Strategic Quality Management and Business Performances in Korea
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 1~17
To satisfy the needs of customers, firms must supply customers with products of high quality. This requires firms establish a quality management system which pursues customer satisfaction in a business strategy. Quality management must be connected with the strategic chain and the firm can obtain excellent performances only when top management leadership which places people over profit is exercised. The purpose of this study is to analyse whether elements of strategic quality management has any effect on quality and business performances. A questionnaire was used for the survey. In this study, it is showed that elements of strategic quality management(strategy, leadership, customer satisfaction, quality improvement activity, technological innovation, shop floor management, employee participation) are positively correlated with the quality and business performances. This tells firms have to carry out the strategic quality management effectively based on the strategic chain and emphasizing leadership.
Using percentage Nonconforming to evaluate Non-Normal Process Capability: Gamma Distributions
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 18~34
This paper is a brief review of the different procedures that are available for fitting theoretical distributions to data. The use of each technique Is illustrated by reference to a distribution system which including the Pearson, Johnson and Burr functions. These functions can be used to calculate percent out of specification. Therefore, in this paper a new method for estimating a measure of process capability for Gamma distributed variable data proposed using the percentage nonconforming. Process capability indices combines with the percentage nonconforming Information can be used to evaluate more accurately process capability.
A Process Monitoring Procedure Using a Correlated Variable
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 35~45
A process monitoring procedure using a correlated variable is presented when a lower specification limit is given on the performance variable. Every item is inspected with a variable correlated with the performance variable. When an item is rejected in the screening inspection, the process is checked for change using the mean and variance of measurements of the correlated variable for n preceding items including the rejected one. The performance variable is assumed to be normally distributed. A linear relationship between the performance and surrogate variables is assumed with normally distributed error term. The monitoring procedure is designed so that the prespecified outgoing quality can be attained.
New Approximations to the Distributions of Sample Variance and (equation omitted)
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 46~58
The exact distributions of the sample variance
and the estimator (
) of the process capability index are not easily obtained in general. In this paper, the approximations using saddlepoint techniques to the distributions of these statistics are suggested and compared with the other approximation methods. For comparisons, the exact values obtained by extensive Monte-Carlo (simulation) studies are also given. As a result, the suggested approximation methods are very accurate even in moderate or small sample sizes and are easy to use. Also, the suggested methods can be adapted to approximate the distributions of more complicated statistics, including
A Measure for Evaluating the Effect of Blocking in Response Surface Designs Using Cuboidal Regions
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 59~79
The fitting of a response surface model and the subsequent exploration of the response surface are usually based on the assumption that the experimental runs are carried out under homogeneous conditions. This, however, may be quite often difficult to achieve in many experiments. To control such an extraneous source of variation, the response surface design should be arranged in several blocks within which homogeneity of conditions can be maintained. In this case, when fitting a response surface model, the least squares estimates of the model's parameters and the prediction variance will generally depend on how the response surface design is blocked. That is, the choice of a blocking arrangement for a response surface design can have a considerable effect on estimating the mean response and on the size of the prediction variance. In this paper, we propose a measure for evaluating the effect of blocking of response surface designs using cuboidal regions.
Reliability of the Mixture Model with Gamma Family Using Gibbs Sampler
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 80~90
In this paper, reliability estimation using Gibbs sampler is considered for the mixture model with Gamma family, Gibbs sampler is derived to compute the features for the posterior distribution. By simulation study, the maximum likelihood estimator and the Gibbs estimator are obtained. A numerical study with a simulated data is provided.
Smooth Nonparametric Estimation of Mean Residual Life
Na, Myung-Hwan ; Kim, Jae-Joo ; Park, Sung-Hyun ;
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 91~100
In this paper we propose a smooth nonparametric estimator of mean residual life based on a complete sample. This estimator is constructed using the maximum likelihood estimate of cumulative failure rate in the class of distributions which have piecewise linear failure rate functions between each pair of observations. We derive the asymptotic properties of our estimator. Examples using simulated data are used to illustrate the performance of this estimation.
Thurstonian Modeling for Triangular Method toward Analysis of Rating Data
Yu, Si-Nae ; Sung, Nae-Kyung ;
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 101~110
Products are often evaluated on rating scales to measure and quantify their attributes of interest. In case that one wishes to compare multiple rating datasets simultaneously, there must be a standardized scale with which one can discriminate relative differences among corresponding scale means. In this regard, the concept of Thurstonian modeling applied to various discrimination tests including the triangular method has been recently being reconsidered. In this paper we extend previous researches on the triangular method and evaluate the effect of unequal variances and correlated variables upon the probability of correct response using Monte-Carlo simulation. We observed that the probability of correct response depends on dimensionality, variances, and correlation structure of stimulus sets. But it does not depend on the relative orientation in a multidimensional space.
A Study on the Application of Quality Function Deployment to Information System Development
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 111~134
Although the role of information system has been rapidly increasing in modern management, there have been few researches on the quality assurance in information system. This paper suggests how to apply quality function deployment(QFD) to information system development in order to build up user-centered quality assurance system. The main focus of the paper is how to design the linkages between management strategy, information systems, and the users using quality function deployment.
ISO/DIS 2859-1(1997), Sampling Plans Indexed by AQL for Lot-by-Lot Inspection
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 135~150
The second edition of the International Standard ISO/DIS 2859-1(1997) is the revised version of ISO 2859-1(1989). Significant changes in this edition include the following; ⅰ) a new procedure for switching from normal to reduced inspection is used, ⅱ) optional fractional acceptance number sampling plans are added, and ⅲ) reduced plans are changed to eliminate the gap between the acceptance and rejection numbers. In this paper, major changes and additions incorporated into the revised version are discussed.
Quality Control Chart Applied to Road Traffic Accident Analysis
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 151~164
Black spots of road traffic accidents are identified and managed in order to prevent potential future accidents. We first pinpoint some problems associated with the current way of defining Black spots in Korea. Next, we show how u and x control charts can be applied to improve those problems. Some suggestions are made for practical utilization of our research findings.
Multiresponse Optimization Using a Response Surface Approach to Taguchi′s Parameter Design
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 165~194
Taguchi's parameter design seeks proper choice of levels of controllable factors (Parameters in Taguchi's terminology) that makes the qualify characteristic of a product optimal while making its variability small. This aim can be achieved by response surface techniques that allow flexibility in modeling and analysis. In this article, a collection of response surface modeling and analysis techniques is proposed to deal with the multiresponse optimization problem in experimentation with Taguchi's signal and noise factors.
A Study on The Quality Comparison of Software Packages for Statistical Analyses
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 195~210
Six Sigma Campaign of Samsung Display Device
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 211~222
6 Sigma is defined as the state of "defect free quality" with only 3.4 defective, goods out of 1 million. Samsung Display Device(SDD) was quick to embark on a new way of quality innovation. The goals of 6 Sigma campaign are established on the foundation of customer satisfaction such as quality, cost and service. Production field of SDD has a special 6 Sigma campaign, SQM(Standard Quality Management). Quality qualification system is introduced and implemented with strong reinforcement. C-S-I(Chart-Solve-Implement) model which was made by Dr. Bajaria(1991) is adopted for the project. All the workers of company will be encouraged to participate in the drive.
Six Sigma Business Breakthrough Strategy
Journal of the Korean society for quality management, volume 27, issue 1, 1999, Pages 223~231
The concept of six sigma was introduced at and popularized by Motorola in its quest to reduce defects of manufactured electronics products. When used as a metric, six sigma technically means having no more than 3.4 defects per million opportunities in any process, product, or service. More important than the technical definition is the concept of six sigma as a disciplined, quantitative approach for improvement of defined metrics in manufacturing, service, or financial processes. This approach derives the overall process of selecting the right projects based on their potential to improve performance metrics and selecting and training the right people to get the business results.