• Title/Summary/Keyword: quality requirements

Search Result 2,032, Processing Time 0.024 seconds

Derivation of Data Quality Attributes and their Priorities Based on Customer Requirements (고객의 요구사항에 기반한 데이터품질 평가속성 및 우선순위 도출)

  • Jang, Kyoung-Ae;Kim, Ja-Hee;Kim, Woo Je
    • KIPS Transactions on Software and Data Engineering
    • /
    • v.4 no.12
    • /
    • pp.549-560
    • /
    • 2015
  • There is a wide variety of data quality attributes such as the ones proposed by the ISO/IEC organization and also by many other domestic and international institutions. However, it takes considerable time and costs to apply those criteria and guidelines to real environment. Therefore, it needs to define data quality evaluation attributes which are easily applicable and are not influenced by organizational environment limitations. The purpose of this paper is to derive data quality attributes and order of their priorities based on customer requirements for managing the process systematically and evaluating the data quantitatively. This study identifies the customer cognitive constructs of data quality attributes using the RGT(Repertory Grid Technique) based on a Korean quality standard model (DQC-M). Also the correlation analysis on the identified constructs is conducted, and the evaluation attributes is prioritized and ranked using the AHP. As the results of this paper, the consistent system, the accurate data, the efficient environment, the flexible management, and the continuous improvement are derived at the first level of the data quality evaluation attributes. Also, Control Compliance(13%), Regulatory Compliance(10%), Requirement Completeness(9.6%), Accuracy(8.4%), and Traceability(6.8%) are ranked on the top 5 of the 19 attributes in the second level.

Investigations Into More Exact Weightings of Customer Demands in QFD

  • Crostack, H.A.;Hackenbroich, I.;Refflinghaus, R.;Winter, D.
    • International Journal of Quality Innovation
    • /
    • v.8 no.3
    • /
    • pp.71-80
    • /
    • 2007
  • Apart from the customer demands themselves, the weightings of the customer demands are one of the main input data of a QFD (Quality Function Deployment) and furthermore of the actual construction process of products. Up to now, most interviews with stakeholders have been carried out with questionnaires and then absolute weightings have been used. Now it has been analysed if the use of other interview and evaluation techniques, e.g. relative weightings and Analytic Hierarchy Process (AHP), can improve the precision of the demands and wishes of the stakeholders. Now the task was to analyse if the use of relative weightings as input of a QFD is possible at all, how they have to be adapted and if an increase in precision compared to the use of absolute weightings is reached. When using AHP during the product development it has become clear that only up to seven demands can be rated at the same time by customers. That means that a kind of hierarchy has to be developed to correctly transfer the demands and their weightings into the QFD.

Service Quality Improvement of Smart Phone Application (스마트 폰 애플리케이션 서비스 품질의 개선)

  • Yeom, Da-Hye;Kang, Chang-Wook
    • Journal of Korean Society of Industrial and Systems Engineering
    • /
    • v.36 no.4
    • /
    • pp.38-44
    • /
    • 2013
  • Smart phones have brought rapid changes in this competitive world. Smart phone application developers are trying their best to consider the customer requirements in the most efficient way while considering all its attributes. However smart phone service quality has been given less consideration comparatively during the last few years. This paper proposes a measurement method for improving service quality of smart phone application. This method combines the service quality performance model (SQPM) and process capability index (PCI). The service quality performance model is used to identify service items that require improvement. Process capability index is used as a measure for prioritization of those improvements. Case study was carried out to search out important communication application service attributes. customer satisfaction level data was collected for users who used the application service. A total of twenty four service attributes were found during this survey. Using the joint approach of SQPM and PCI, five significant service attributes were prioritized for service quality improvement.

Configurations of AC and DC-type Quality Control Center for a New Distribution System FRIENDS

  • Hayashi Yusuke;Saisyo Masaki;Ise Toshifumi;Tsuji Kiichiro
    • Proceedings of the KIPE Conference
    • /
    • 2001.10a
    • /
    • pp.497-501
    • /
    • 2001
  • Unbundled power quality service is paid much attention under the circumstances of deregulation and diversification of needs of customers for quality and price of electric power. Moreover, distributed generators (DGs) such as photovoltaic generations and wind turbines will be introduced to distribution system more and more, and reverse flow of active power has possibility to cause new problems in the distribution system such as voltage rise of distribution line and protection problem. Flexible, Reliable and Intelligent Electrical eNergy Delivery System, which is called FRIENDS, has been proposed as one of promising distribution system for such requirements, and intensive studies are under way. One of features of the system is introducing Quality Control Center (QCC) into the system for unbundled power quality service and easy installation of DGs. Two types of QCCs for such purposes are proposed, and simulation results are shown in this paper.

  • PDF

A Systematic Approach to Quality Measurement of Official Statistics) (국가통계 품질측정을 위한 체계적 접근 - 표본조사의 품질평가지표 개발을 중심으로)

  • 이동명;김설희
    • Proceedings of the Korean Association for Survey Research Conference
    • /
    • 2002.11a
    • /
    • pp.111-127
    • /
    • 2002
  • As the utilization of official statistics has been recently increased, the necessity of objective quality assessment also has been increased. Since mean square error(MSE) and response rate, which have been considered as representative quality indicators in the past, may have the limits of use, it has been demanded to develop new quality indicators which are able to reflect the various requirements of users. In this paper, regarding sample surveys conducted by governmental agencies, the flow of procedures in statistics production is analyzed using input-output of each procedure. As the result, how to identify and develop quality indicators for each procedure is discussed, with some instances of indicators. Finally, the quality index using the results of quality assessment would be calculated based on a weighting method by the size of deviation of statistical measures.

  • PDF

Automotive Functional Safety-ISO 26262 and Its Countermeasures (자동차 기능안전 ISO 26262와 대응방안)

  • Jung, Eun-Ki;Kwon, Hyuck-Moo;Lee, Min-Koo;Kim, Dong-Chun;Hong, Sung-Hoon
    • Journal of Korean Society for Quality Management
    • /
    • v.41 no.2
    • /
    • pp.185-196
    • /
    • 2013
  • Purpose: This paper is focused on introducing the Automotive Functional Safety International Standard-ISO 26262 and proposing effective countermeasures of ISO 26262. Methods: We studied collected data about ISO 26262 and analyzed the relationship between ISO 26262 and Quality 5 Star of Hyundai Kia Motors for the integrated product development process. Results: Results showed the product development process for the integration plan between ISO 26262 and Quality 5 Star. In addition, we added an entry about the functional safety in the evaluation item of Quality 5 Star System. Conclusion: In order to introduce ISO 26262 effectively, we proposed ISO 26262 requirements and functional safety concept to be added to Quality 5 Star.

Critical Evaluation of and Suggestions for a Comprehensive Project Based on the Special Act on Seoul Metropolitan Air Quality Improvement (수도권 대기환경 개선사업-진단과 제언)

  • Baek, Sung-Ok;Koo, Youn-Seo
    • Journal of Korean Society for Atmospheric Environment
    • /
    • v.24 no.1
    • /
    • pp.108-121
    • /
    • 2008
  • On January 1, 2005, the Korean Ministry of Environment put into operation a comprehensive program, so called 'Blue Sky 21' project, for the improvement of air quality in greater Seoul metropolitan area. This program was legally based on the 'Special Act on Metropolitan Air Quality Improvement' for Greater Seoul area, which was established in 2003, and should be updated every 10 years. The principal objective of this program is to improve the air quality in Seoul and surrounding area by 2014 to the levels of air quality in Tokyo and Paris, with particular emphases on reducing the concentrations of nitrogen dioxide and $PM_{10}$. Any regulation of the emission of toxic air pollutants in general, and $NO_2$ and $PM_{10}$ in particular, should be based on human exposure levels and consequential health effects. In this article, the contents and feasibility of the special program were critically evaluated with respect to the reduction of health risks. Important issues for improving not only air quality but public health are discussed, and future requirements for the success of the special program are suggested.

Durability design and quality assurance of major concrete infrastructure

  • Gjorv, Odd E.
    • Advances in concrete construction
    • /
    • v.1 no.1
    • /
    • pp.45-63
    • /
    • 2013
  • Upon completion of new concrete structures, the achieved construction quality always shows a high scatter and variability, and in severe environments, any weaknesses and deficiencies will soon be revealed whatever durability specifications and materials have been applied. To a certain extent, a probability approach to the durability design can take the high scatter and variability into account. However, numerical solutions alone are not sufficient to ensure the durability and service life of concrete structures in severe environments. In the present paper, the basis for a probability-based durability design is briefly outlined and discussed. As a result, some performance-based durability requirements are specified which are used for quality control and quality assurance during concrete construction. The final documentation of achieved construction quality and compliance with the specified durability are key to any rational approach to more controlled and increased durability. As part of the durability design, a service manual for future condition assessment and preventive maintenance of the structure is also produced. It is such a service manual which helps provide the ultimate basis for achieving a more controlled durability and service life of the given concrete structure in the given environment.

A Multi-category Task for Bitrate Interval Prediction with the Target Perceptual Quality

  • Yang, Zhenwei;Shen, Liquan
    • KSII Transactions on Internet and Information Systems (TIIS)
    • /
    • v.15 no.12
    • /
    • pp.4476-4491
    • /
    • 2021
  • Video service providers tend to face user network problems in the process of transmitting video streams. They strive to provide user with superior video quality in a limited bitrate environment. It is necessary to accurately determine the target bitrate range of the video under different quality requirements. Recently, several schemes have been proposed to meet this requirement. However, they do not take the impact of visual influence into account. In this paper, we propose a new multi-category model to accurately predict the target bitrate range with target visual quality by machine learning. Firstly, a dataset is constructed to generate multi-category models by machine learning. The quality score ladders and the corresponding bitrate-interval categories are defined in the dataset. Secondly, several types of spatial-temporal features related to VMAF evaluation metrics and visual factors are extracted and processed statistically for classification. Finally, bitrate prediction models trained on the dataset by RandomForest classifier can be used to accurately predict the target bitrate of the input videos with target video quality. The classification prediction accuracy of the model reaches 0.705 and the encoded video which is compressed by the bitrate predicted by the model can achieve the target perceptual quality.

Use of VHVl Base Oils for High Performance ATFs

  • Moon, Woo-Sik;Yang, Si-Won
    • KSTLE International Journal
    • /
    • v.2 no.2
    • /
    • pp.120-126
    • /
    • 2001
  • Performance requirements for automatic transmission fluids have been changed reflecting the design changes of automatic transmissions. The major purpose of these design changes is concentrated upon improvements of both fuel economy and drivability. In order to formulate such high performance ATFs as satisfy those requirements, it is necessary to use high quality base oils like VHVI base oils and PAOs. In this study, the effect of base oils characteristics on ATF performance is investigated, mainly regarding differences in frictional characteristics with deterioration. Frictional characteristics are determined using the SAE No. 2 machine and ATFs are deteriorated under various controlled conditions. Moreover low-temperature fluidity, oxidation stability, and seal compatibility are also compared for four different ATFs. From the investigation, it was found that the use of Group III and IV base oils in ATFs gives several benefits with respect to low temperature viscosity, oxidation stability and SAE No.2 friction characteristics.

  • PDF