• Korean Journal of Construction Engineering and Management
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• v.6 no.1 s.23
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• pp.125-132
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• 2005

Domestic construction firms make every effort to save cost and, contrarily, enhance quality for competitive advantage in the market. Structural work of building construction takes chaise of the total cost and schedule, thus elaborate planning and management of the work help to lead the project into a successful way. Therefore, the idea to save time and cost and enhance constructability securing quality and safety of the work should be developed after analyzing the designed documents and site conditions comprehensively in the initial construction planning phase. Value Engineering (VE) technique is introduced in the substructural work in this paper to save cost creatively and systematically in the design and construction phase. A practical VE model that is applied to the underground building work systematically is proposed to save cost and it applies to the actual project to confirm the effectiveness of the model.

• Journal of Korean Society for Quality Management
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• v.49 no.3
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• pp.341-358
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• 2021

Purpose: After product development, a Reliability Demonstration Test(RDT) is performed to confirm that the target life has been achieved. In the RDT, there are cases where the test equipment cannot accommodate all samples. Therefore, this study considers a test method to most economically demonstrate the target life of the product at a certain confidence level when the sample size is larger than the capacity of the test equipment. Methods: If the sample size is larger than the capacity of the test equipment, test equipments may be added or the test time of individual samples may be increased. So the test method is designed to cover this situation with limited capacity. A zero-failure test method is applied as a test method to RDT. To minimize the cost, the test cost is defined and the cost function is obtained. Finally, we obtain the optimal test plan. Results: A zero-failure test method is designed when the sample size is larger than the capacity of the test equipment, and the expected total cost is derived. In addition, the process of calculating the appropriate sample size, test time, and number of test equipment is illustrated through an example, and the effects of model parameters to the optimal solutions are investigated numerically. Conclusion: In this paper, we study a zero-failure RDT with test equipment that has limited capacity. The expected total cost is derived and the optimal sample size, test time, and number of test equipment are determined to minimize the expected total cost. We also studied numerical examples and for further studies, we can relax some restrictions in the test model and optimize the test method.

• Journal of the East Asian Society of Dietary Life
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• v.18 no.1
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• pp.149-157
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• 2008

This study examined the cost consciousness, food materials satisfaction, job satisfaction, and degree of food materials management of chefs, as a means to increase food materials management efficiency in hotel restaurants and to make suggestions, for efficiently reducing food material costs, Chefs from eleven 5-star hotels and one exceptional-grade restaurant in Seoul were asked to fill out a questionnaire for sampling. A total of 350 questionnaires were distributed and 334 were returned (95.4% return rate). The characteristics of the respondents were examined by population statistics analysis, and the chefs' cost consciousness, food materials satisfaction, and job satisfaction were examined by descriptive statistics after reliability and propriety analyses. The degree of cost consciousness in the respondents was very high and this degree of consciousness proved to have a partially significant impact on the degree of food materials management. That is when the chefs were more conscious about cost, the degree of food materials management was high. This implies that food materials satisfaction can be enhanced by enhancing the degree of food materials management. Job satisfaction also had a partially significant, influence on the degree of food materials management. Therefore, it is necessary to maintain consistency in the quality and inspection of food materials, provide related information, enhance the satisfaction level for standards of food materials and improve policies for welfare and career after retirement in order to enhance the job satisfaction of chefs and subsequently reduce costs in relation to the level of food materials management.

• Journal of Korean Society for Quality Management
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• v.16 no.1
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• pp.1-7
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• 1988

The most important element upon the quality of family glass products is the color of glass, which is the first object of consumers concern in purchasing. Therefore, colorless and transparent color tone can level up the additional value of the products. But we have produced the glass products in a large quantity by using the automatic tank brazier, chronic problem has been left over the color tone. By compounding and analizing the management techniques applied by peculiar technique and design of experiments pertinently, and by adjusting the decoloring composition ratio, we can contribute to improvement of color tone as well as to the cost reduction by diminishing the unnecessary decoloring agent. Intangible effect was the securing the superiority of quality home and abroad with the improvement of color tone and was taking a triangular position the factors influencing the glass decoloring which had been an unexhausted field. Tangible effect was the reduction of decoloring cost by diminishing the unnecessary oxidant. We registered the optimal composition ratio condition which was searched by applicating the design of experiments. To maintain good color tone, we manage the degree of purity, the most important thing among the items of color tone, continuously by control chart and it has maintained steady state now.

• Korea Journal of Hospital Management
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• v.4 no.2
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• pp.21-40
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• 1999

One Diagnosis Related Group(DRG) pilot study participating hospital was measured and analyzed to see if there were any changes after the DRG program. It was implemented in consideration of medical service utilization, hospital charges, and non-covered medical service charges by insurance in all Cesarean section cases by reviewing medical records for 3 years, including 1 year before pilot study as well as 1 and 2 years after, respectively. The results were as follows: First, the use of intramuscular antibiotics decreased statistically significantly, whereas intravenous use did not. Second, the administration period and charges of antianemic medication decreased significantly, where the prescription was appropriate. Third, the length of hospital stay decreased statistically significantly. Fourth, there were significant statistical differences in cost sharing between the insured and the insurer: cost sharing of the insured was reduced, whereas the share of the insurer increased. However, there was no change in the quality of care. Fifth, there were no statistically significant changes in the Cesarean section rate. As a result, if the fee schedule is reasonably high, hospitals can provide quality care. This DRG pilot study resulted expected outcomes: by paying a higher fee schedule than fee-for-service, then hospitals can provide quality care to their patients and increase hospital profits.

• Journal of the Korean Society for information Management
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• v.20 no.4 s.50
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• pp.249-275
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• 2003

In companies competing for today's information society, Data quality deterioration is causing a negative influence to generate company competitiveness fall and new cost. A lot of Preceding study about data qualify have been proceeded in order to solve a problem of these data qualify deterioration. Among the sides of data qualify, it has been studied mainly on qualify of the data valve and quality of data service that are the results quality concept. However. this study studied structural qualify of the data which were cause quality concept in a viewpoint of meta data management and presented data quality management maturity model through this. Also empirically this study verified that data quality improved if the management level matured.

• Journal of Korea Society of Industrial Information Systems
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• v.7 no.1
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• pp.1-9
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• 2002

Though Quality Management(QM) is key determinant for corporate success as shown in Jappanese cases, however, its performance wasn't translated into the context of profitability, which is a good managerial means. Meanwhile the quality cost theory is a different attempt to measure the quality management performance with a financial scale, which doesnot have a reasonable measure. This study suggests a new approach to measure the performance of quality management using ABC(Activity-based Costing), and explains its usefulness with a case study.

• Proceedings of the Korean Society for Quality Management Conference
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• 2007.04a
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• pp.139-144
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• 2007

본 연구는 최고경영자의 품질비용에 관한 리더십이 기업의 품질비용에 관련된 활동에 미치는 영향을 분석하였다. 또한 기업의 품질비용관련 활동이 생산성향상(원가절감)에 미치는 효과를 분석하였다. 분석의 결과에 의하면 품질비용에 관한 최고경영자의 리더십이 품질비용 관련 활동을 경유하여 생산성 향상에 긍정적 영향을 미침을 확인하였다. 이 연구는 생산성향상을 통하여 원가를 절감하기 위해서는 품질비용에 대한 최고경영자의 관심도가 매우 중요함을 보여주고 있다.

• Proceedings of the Korean Society for Quality Management Conference
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• 2010.04a
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• pp.123-128
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• 2010

This article investigates economic-statistical design of VSI(variable samling interval) charts considering Various Runs Rules. Most recent adaptive control charts are conplex designs. Actually It's not easy to operating control quality process. We propose a procedure for designing VSI Runs charts, based on Lorenzen and Vence's model. The optimal design parameters of the charts can be determined by minimizing the cost model. And computational experiments show that the VSI Runs Rules charts is superior to the FSSI Runs Rules charts in the economic-statistical characterisitics.

• Journal of Korean Society for Quality Management
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• v.29 no.1
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• pp.61-84
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• 2001

The problem of trend change in the failure rate is great interest in the reliability and survival analysis. In this paper we develop a test statistic for testing whether or not the failure rate changes its trend based on a complete sample. Monte Carlo simulations are conducted to investigate the speed of convergence of the proposed test statistic.