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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 26, Issue 4 - Dec 1998
Volume 26, Issue 3 - Sep 1998
Volume 26, Issue 2 - Jun 1998
Volume 26, Issue 1 - Mar 1998
Selecting the target year
Analysis of the Effect of ISO 9000 Certification Based on Crosby's Quality Management Maturity Grid
Journal of the Korean society for quality management, volume 26, issue 2, 1998, Pages 1~16
The effect of ISO 9000 jcertification for quality management is investigated. 213 domestic manufacturing companies which had been certified more than one and half year ago were selected to send the questionnaires for a field survey. Among them 89 were returned. Crosby's Quality Management Maturity Grid' is utilized for analyzing the effect of ISO 9000 certification aquistion. Comparisons for the QM maturity level are made between before- and after-aquisition. It is shown that, on the average, the QM maturity level had been increased from awakening (stage 2) to the mid point of enlightenment(stage 3) and wisdom(stage 4).
Determination and Analysis of Signal-to-Noise Ratios for Parameter Design with Dynamic Characteristics
Journal of the Korean society for quality management, volume 26, issue 2, 1998, Pages 17~26
Taguchi's parameter design is a method for quality improvement by making the performance fo a system robust to noise. Parameter design with dynamic characteristics has been recently the subject of much interest. This paper is concerned with a review and a generalization of the Signal-to-Noise (SN) ratio, a quality measure for parameter design with dynamic characteristics, proposed by Taguchi. We present a method for determination and analysis of the generalized SN ratio and illustrate its implementation by example.
Estimation of Freund Model for System Level Life Testing Using Component Life Data
Journal of the Korean society for quality management, volume 26, issue 2, 1998, Pages 27~38
Consider a life testing experiment in which multiple two-component shared parallel systems are put on test, and the test is terminated at a specified number of system failures. The bivariate data obtained from such a system-level life testing can be classified into three classes: 1) the case of failed two components with known failure times, 2) the case of censored two components, and 3) the case of one censored component and the other failed component of which the failure time might be known or unknown. Under this censoring scheme and the assumption of Freund's bivariate exponential life distribution, the maximum likelihood estimators are obtained. Results of comparative studies based on Monte Carlo simulation are presented.
Review of Screening Procedure as Statistical Hypothesis Testing
Journal of the Korean society for quality management, volume 26, issue 2, 1998, Pages 39~50
A screening procedure, where one or more correlated variables are used for screeing, is reviewed from the point of statistical hypothesis testing. Without assuming a specific probability model for the joint distribution of the performance and screening variables, some principles are provided to establish the best screeing region. A, pp.ication examples are provided for two cases; ⅰ) the case where the performance variable is dichotomous and ⅱ) the case where the performance variable is continuous. In case ⅰ), a normal model is assumed for the conditional distribution of the screening variable given the performance variable. In case ⅱ), the performance and screening variables are assumed to be jointly normally distributed.
Control Chart for Correlation Coefficients of Correlated Quality Variables
Kim, Jae-Joo ; Chang, Duk-Joon ;
Journal of the Korean society for quality management, volume 26, issue 2, 1998, Pages 51~60
Exponetially weighted moving average(EWMA) control chart to simultaneously monitor correlation coefficients of several correlated quality variables under multivariate normal process are proposed. Performances of the proposed control charts are measured in terms of average run length(ARL) by simulation. Numerical results show that smaller values of smoothing constant are more efficient in terms of ARL.
A Study on the Effect of Information Technology on Process Improvement
Journal of the Korean society for quality management, volume 26, issue 2, 1998, Pages 61~81
This research studies the role of IT (Information Technology) in improving productivity of a company through samll group activities. For this purpose, this research analyzed the samll group activities of the company as to how IT was employed bo improve business processes. Cases of small group activities that were conducted from January, 1996 to December, 1996 in a Korean company (name withdrawn) were analyzed. Eight out of eleven small group activities have been studied. They were examined as to the effect of IT in time and cost savings, reduction in manpower and so on. TQM is the activity of process improvement based on the existing processes in pursuit of satisfaction of customers' needs. This study analyzed how IT was used to solve the current problem in business processes. As a result of the case study, it is found that TQM activities with IT could reduce expenses significantly. More specifically, expenses have been cut down by 56% a year on average. By improving the business processes through the activities of TQM which used IT, companies could remove the unnecessary business processes and the duplicated business processes. In other words, with the use of IT in TQM activities, they could move closer to goals of the satisfaction of the customers' needs by reducing expenses and time. This study examined the role of IT from the point of view of business process improvement. Internally, IT has a positive impact on reducing expenses, processing time, manpower and so forth. Externally, it plays an important role of company's gaining competitive advantage through the satisfaction of customers and stakeholders. In conclusion, the proper use of IT will significantly increase the performance of a company.
Criteria for Quality Award and Measurement of Management Quality
Journal of the Korean society for quality management, volume 26, issue 2, 1998, Pages 82~92
This paper reviews major aspects of the Malcolm Baldrige National Quality Award and introduces some evidences that the Baldrige criteria can assess the quality of management to some extent. It is also discussed that how can we improve our national quality award program.
Remark on the Problems of Survey Methods Applied to Customer Satisfaction for Discount Stores
Journal of the Korean society for quality management, volume 26, issue 2, 1998, Pages 93~105
Many large scale discount stores try to enter the market in newly developed city areas. In order to sucessfully increase the market share, it is essential for them to understand customers' needs. In doing so, various forms of survey methods are often used and survey forms can influence respondents' decision. The main objective of this paper is to check consistency of different survey methods in terms of deriving the expected market share. In this paper, we a, pp.y two survey forms for both AHP and conjoint analyses using a randomized complete block design. Using AHP, we compare Kim's club, Carf, E-mart and Macro in terms of the following four customer attributes: parking facility, size of store, business hours, and special pricing policy. In conjoint analysis, we estimate the part-worth of each level of the customer's attribute so that one can design the best store which would optimizethe customer's attribute so that one can design the best store which would optimize the customer's utility. Empirical comparison results indicate very low consistency between the two methods. It implies the importance of verification methods of survey. We also analyze the impact of special pricing policy using a meta analysis. It turns out that older customers are a, pp.rently more sensitive to pricing policy.
A Case Study for Quality Improvement Process for the PCB Manufacturing
Journal of the Korean society for quality management, volume 26, issue 2, 1998, Pages 106~117
The following study has been undertaken to build QIP (Quality Improvement Process) of an inner-layer process in a PCB (Printed Circuit Board) manufacturing plant. The objective of the study is stabilization and optimization of the process through quality improvement. To do that, defective factors in process are gathered by the cause and effect analysis and classified by PFD (Process Flow Diagram), key factors are found out by PFMECA (Process Failure Mode and Effect Criticalty Analisis), DOE(Design of Experiments) is a, pp.ied to those key factors to optimize the process, SPC (Statistical Process Control) chart is used to maintain the optimal conditions of the process and to improve quality continuously, and a quality management system is developed to improve quality mind and quality system for the PCB jmanufacturing plant. Overall, QIP is established to improve quality for the PCB manufacturing plant in the study.