• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.21 no.46
• /
• pp.119-125
• /
• 1998

In this study, a traditional concept of sampling inspection plan for the quality assurance system is extended to a consideration of economic aspects in total production system by representing and analyzing the effects between proceeding / succeeding production process including inspection. This approach recognizes that the decision to be made at one manufacturing process (or assembly process) determine not only the cost and the average outgoing quality level of that process but also the input parameters of the cost and the incoming quality to the succeeding process. By analyzing the effects of the average incoming and outgoing quality, manufacturing / assembly quality level and sampling inspection plan on the production system, mathematical models and solution technique to minimize the total production cost for a single product manufacturing system with specified average outgoing quality limit(AOQL) are suggested.

• Journal of the Korea Society of Computer and Information
• /
• v.23 no.12
• /
• pp.115-122
• /
• 2018

As the proportion of software in weapon systems increases, the impact of software on the overall system is growing. As a result, software quality management becomes important, and related regulations and work manuals for quality assurance activities at each stage in the R & D process are becoming more sophisticated. However, due to the characteristics of the weapon system software that is developed as a customized form for the purpose of a specific mission, there are limits to specifying and definitizing the detailed requirements (upper and lower level) according to various operational concepts during the development process. Due to this, software modification (patch change, shape change due to upgrade, etc.) occurs on account of many defects and performance improvement in the mass production and operation stage after the development is completed. In this study, we analyze the characteristics of these weapon system softwares and propose quality improvement methods based on ISO / IEC / IEEE 29119 test method.

• Journal of Korean Society for Quality Management
• /
• v.24 no.1
• /
• pp.110-125
• /
• 1996

Since 1975, Korean defence quality system has been operated by adopting defence specifications, 0050-0015, 0050-0029 and 0050-0030, which were based on the American specifications, MIL-Q-9858, MIL-Q-45208 and MIL-STD-45662. The trend that the ISO certification is intensively required for the international trade, and the need for modernization of the Korean military forces, however, provide motivation to revise the defence quality system. In this study, an improved defence quality system has been proposed by the comparison study among the requirements prescribed in ISO 9000, AQAP 100 series, MIL-Q-9858.

• Journal of Korean Society of Industrial and Systems Engineering
• /
• v.15 no.26
• /
• pp.137-150
• /
• 1992

As a part of quality control activities for developing competitive products, the significant method of process quality assurance for solving initial production quality problems is just quality control process chart(QC process chart). However, the QC process chart which is used for domestic enterprises at present had obscured in basement and not itemized by industry and formally used. So. in this study, the improved QC process charts which classified by industry we suggested so that each enterprise may utilize them according to the each enterprise characteristics.

• Journal of Korea Society of Industrial Information Systems
• /
• v.7 no.1
• /
• pp.10-15
• /
• 2002

It is presented to extended to an interaction matrix formulation to the problem of system and disturbance identification for a plant that is corrupted by both process and output disturbances. With only an assumed upper bound on the order of the system and an assumed upper bound on the number of disturbance frequencies, it is shown that both the disturbance-free model and disturbance effect can be recovered exactly from disturbance-corrupted input-output data without direct measurement of the periodic disturbances. The rich information returned by the identification can be used by an iterative learning or repetitive control system to eliminate unwanted periodic disturbances. Those can be helped to apply to the multiple dynamic systems for precision quality assurance.

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.18 no.2
• /
• pp.405-414
• /
• 2017

In this study, a survey for a satisfaction evaluation of the Test Report Information Service (TRIS) was conducted. A survey questionnaire on modified Information System Success Model(ISSM) of Delone and Mclean was carried out by 183 users in three groups, such as munition quality assurance agency, munition corporation, and test institute. As a survey result, training on the TRIS was in strong demand in all three groups. An understanding and proficiency of the overall system were different from the work process of each user group. In addition, the munition quality assurance agency needs to enhance the system function with its characteristics. Test institute has necessity of the linkage method with the TRIS depending on the authentication system. User groups are different in the operational method of TRIS between the contractor and cooperation. Accordingly, cooperation needs to be educated continually. This study can help in the construction of a Military Quality Integration Information System to secure the reliability of munitions.

• International Journal of Quality Innovation
• /
• v.2 no.2
• /
• pp.93-100
• /
• 2001

This paper illustrates a prototyping framework of the documentation-standards retrieval system via the data mining approach for enhancing software development quality. We first present an approach for designing a retrieval algorithm based on data mining, with the three basic technologies of machine learning, statistics and database management, applied to this system to speed up the searching time and increase the fitness. This approach derives from the observation that data mining can discover unsuspected relationships among elements in large databases. This observation suggests that data mining can be used to elicit new knowledge about the design of a subject system and that it can be applied to large legacy systems for efficiency. Finally, software development quality will be improved at the same time when the project managers retrieving for the documentation standards.

• Health Policy and Management
• /
• v.24 no.2
• /
• pp.109-119
• /
• 2014

In accordance with the government's plan to expand the national health insurance (NHI) coverage for severe diseases such as cancer, heart disease, cerebrovascular disease, and rare and incurable disease, the diagnostic ultrasound services have been covered by NHI from October 1, 2013. The quality is very important factor in providing diagnostic services because they influence on the diagnosis, treatment, and outcome of diseases. In particular, equipments and health care providers plays an important role in providing qualitative services. The purpose of this paper is to examine the major feature of ultrasound services covered by health security system and to review quality assurance policies in other countries such as Australia, Japan, the USA, and Canada. In addition, we assessed the implication of those policies. We especially put emphasis on the types and qualifications of healthcare professionals and measures to manage equipments. All countries have reviewed on policies to promote the quality such as educational requirements of professionals or restrictions on the duration of equipment usage. Various measures should be implemented to assure the qualitative ultrasound service.

• Journal of Yeungnam Medical Science
• /
• v.39 no.2
• /
• pp.108-115
• /
• 2022

Background: This study was aimed at comparing and analyzing the results of FractionLab (Varian/Mobius Medical System) with those of portal dosimetry that uses an electronic portal imaging device. Portal dosimetry is extensively used for patient-specific quality assurance (QA) in intensity-modulated radiotherapy (IMRT). Methods: The study includes 29 patients who underwent IMRT on a Novalis-Tx linear accelerator (Varian Medical System and Brain-LAB) between June 2019 and March 2021. We analyzed the multileaf collimator DynaLog files generated after portal dosimetry to evaluate the same condition using FractionLab. The results of the recently launched FractionLab at various gamma indices (0.1%/0.1 mm-1%/1 mm) are analyzed and compared with those of portal dosimetry (3%/3 mm). Results: The average gamma passing rates of portal dosimetry (3%/3 mm) and FractionLab are 98.1% (95.5%-100%) and 97.5% (92.3%-99.7%) at 0.6%/0.6 mm, respectively. The results of portal dosimetry (3%/3 mm) are statistically comparable with the QA results of FractionLab (0.6%/0.6 mm-0.9%/0.9 mm). Conclusion: This paper presents the clinical performance of FractionLab by the comparison of the QA results of FractionLab using portal dosimetry with various gamma indexes when performing patient-specific QA in IMRT treatment. Further, the appropriate gamma index when performing patient-specific QA with FractionLab is provided.

• Journal of Korean Academy of Nursing
• /
• v.34 no.7
• /
• pp.1243-1254
• /
• 2004

Purpose: This study was performed to give direction to quality improvement strategies of nursing services by comparing the differences in quality perceptions and satisfaction for nursing services between patients and nurses in small-medium sized general hospitals with 200 beds. Method: The subjects, who were 150 inpatients and 162 nurses of 4 general hospitals in a community, answered a self-report questionnaire with a SERVQUAL scale. Result: There were differences between patients' and nurses' expectations and perceptions of nursing service and satisfaction. In the service expectation, the highest factor was 'the responsiveness', and in the perceived performance, the highest was the 'assurance'. In addition, overall patients' perceptions on nursing services showed higher than nurses'. There were positive correlations among the expectations and perceptions on nursing service, and satisfaction. The correlation between perception and satisfaction was higher than the correlation between expectations and satisfaction. Conclusion: To improve the nursing service quality at small-medium hospitals, strengthening the 'assurance' factor and improving the nursing service support system is needed. Also, this study on nurses' perceived nursing service at small-medium sized hospitals should be duplicated.