• Title/Summary/Keyword: Quantitative Criteria

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A Quantitative Trust Model with consideration of Subjective Preference (주관적 선호도를 고려한 정량적 신뢰모델)

  • Kim, Hak-Joon;Lee, Sun-A;Lee, Kyung-Mi;Lee, Keon-Myung
    • Journal of the Korean Institute of Intelligent Systems
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    • v.16 no.1
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    • pp.61-65
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    • 2006
  • This paper is concerned with a quantitative computational trust model which lakes into account multiple evaluation criteria and uses the recommendation from others in order to get the trust value for entities. In the proposed trust model, the trust for an entity is defined as the expectation for the entity to yield satisfactory outcomes in the given situation. Once an interaction has been made with an entity, it is assumed that outcomes are observed with respect to evaluation criteria. When the trust information is needed, the satisfaction degree, which is the probability to generate satisfactory outcomes for each evaluation criterion, is computed based on the outcome probability distributions and the entity's preference degrees on the outcomes. Then, the satisfaction degrees for evaluation criteria are aggregated into a trust value. At that time, the reputation information is also incorporated into the trust value. This paper presents in detail how the trust model works.

A Study on the Development of Quantitative Assessment Criteria of Level Safety and Health, Environment (안전보건환경 수준의 정량적 평가기법 구축에 관한연구)

  • Lim, Jae Chang;Jeong, Hyun Wook;Kang, Kyung-Sik
    • Journal of the Korea Safety Management & Science
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    • v.16 no.3
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    • pp.1-7
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    • 2014
  • In this study, based on the international standard the quantitative assessment model for the level of safety, health and environment was developed. As a result of applying this model, the company(workplace) which has established improvement plan based on quantitative assessment of short-term and long-term requirements, and implemented it was acquired more higher level of safety, health and environment by more than the existing ones.

A Study on a Re-Thesis Necessity of Software Quality evaluation Methodology using AHP method (AHP기법을 이용한 소프트웨어 품질 평가 방법론 재정립 방안에 관한 연구)

  • Sung, Kyung Sang;Choi, In Hwa;Hwang, Jun;Park, Chan Kil
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.5 no.4
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    • pp.263-272
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    • 2009
  • Nowadays, lots of software that have similar functions is being produced. Hence it is getting more important to select the best and suitable software for each individual or company. Moreover, there are few trustworthy materials regarding to the objective procedure and criteria for the best evaluation of the software quality. To overcome these problems, benchmarking has been carried out. However, benchmarking is also confronting the limit of quality evaluation verification due to the difficult of the objectification of the major test items. To solve these problems, some others try to evaluate the quality of software using objective criteria of evaluation based on ISO/IEC standards. Nevertheless, this method using these defined evaluation items and criteria may result in not very reliable outcome. Therefore, this paper offers the evaluation items reflected in the characteristics of each software in order to prove the validity of the proposed method. Moreover, the objective and quantitative criterion which analyzes and reflects the organization characteristics using AHP methodology is applied to the experiment and performance evaluation. Hence we expect that the proposed method provides the needs of the re-establishment of software quality evaluation criteria and the improvement of process in terms of management.

Determination of Ratio of Wood Deterioration Using NDT Technique

  • Lee, Jun-Jae;Bae, Mun-Sung
    • Journal of the Korean Wood Science and Technology
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    • v.32 no.3
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    • pp.33-41
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    • 2004
  • In ancient wooden structures, the mechanical properties of the structural members have been reduced by time-dependent degradations such as fatigue or creep. Also, the external and internal deterioration was caused by environmental condition, fungi, bacteria, or insect, and then reduced the quality of structural members. However, the previous methods for evaluating the deterioration have been mainly depended on the visual inspection. In this study, therefore, ultrasonic stress wave test, accelerometer stress wave test were used to evaluate the deterioration of structural wood members in ancient wooden structures. Based on the results, the quantitative criteria of stress wave transmitted velocity were proposed to evaluate the deterioration of structural member. The proposed criteria were related to the degree of deterioration. In accelerometer stress wave, the criteria of deterioration of wave reciprocal velocity was below 1800 ㎲/m at incipient deterioration (below 12% ratio of deterioration), between 1800 and 2200 ㎲/m at moderate deterioration (12~17%) and above 2200 ㎲/m at severe deterioration (above 17%). The ultrasonic stress wave, the criteria of deterioration were 800 and 950 ㎲/m at below 8% and above 15% of the degree of deterioration respectively.

A Study on Incidence of Risk Factor for Assessing Maritime Traffic Risk

  • Kim, Inchul
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.23 no.3
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    • pp.217-223
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    • 2017
  • In order to assess risk as a basic step for securing safety, it requires to select risk factors and determine the frequency and the severity of the consequence of each risk factor. This research adopted common risk factors among well-known maritime risk assessment models, and proposed objective criteria to gauge the risk level of each risk factor. The starting points of risk evolution were chosen for criteria according to related studies and seafarers' experience. The rate of risk appearance over the criteria is named as the incidence of risk factor. Therefore, the total risk level is expressed as the combination of incidence of each risk factor and severity. This quantitative method would be applied to measuring and comparing the risk level of target maritime zones, and it would also be useful to survey which risk factor be focused for reducing the total risk of a certain maritime zone.

Study for Remove of Uncertainty by Identification of Ambiguity (모호성 식별에 의한 불확실성 제거에 관한 연구)

  • Lee, Eun-Ser
    • KIPS Transactions on Software and Data Engineering
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    • v.4 no.1
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    • pp.31-36
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    • 2015
  • There are many uncertainty items when we're working on a software. Especially, if we don't have experience in similar field, ambiguity items have a strong influence on the system entirely. Management of ambiguity items such like uncertainty things is important the factor for reliability of software. Therefore, this research is processing the evaluation criteria for remove of uncertainty items by identify of ambiguity items. Also, this research provides criteria of uncertainty identify and processing of uncertainty items, quantitative evaluation criteria to the remove of ambiguity on software development.

A Method to Monitor the Reliability of In-house Power Supply Systems in Nuclear Power Plants Based on Probabilistic Assessment (확률론적 평가를 이용한 원자력발전소 소내전력공급계통 신뢰도 감시 방법)

  • Park, Jin-Yeub;Jerng, Dong-Wook
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.3
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    • pp.444-449
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    • 2009
  • This paper introduces a method to establish performance criteria of the in-house power supply system in nuclear power plants. The performance criteria of the system is presented in terms of the number of function failures and amount of the out-of-service time that can be allowed commensurate with the probabilistic safety assessment results of the nuclear power plants. To obtain the performance criteria such as reliability and availability, the functions of the system were analyzed and probabilistic assessment results were utilized. This method provides quantitative guidelines in selecting and monitoring system functions to determine an adequate level of maintenance quality in order to ensure the probabilistic goals for the safety of the nuclear power plants.

A Strategy of Selecting Critical Items for Reliability Tests Using Fuzzy Inference (퍼지추론을 이용한 신뢰성 시험 대상 품목 선정 전략)

  • Son, Young-Beom;Yang, Jung-Min
    • IEMEK Journal of Embedded Systems and Applications
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    • v.13 no.4
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    • pp.205-214
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    • 2018
  • The reliability test is a crucial step for ensuring robustness of high-cost and complex weapon systems. In this paper, we present a set of quantitative criteria to select critical parts or components in weapon systems for the reliability test, and implement a fuzzy inference system by applying developed criteria to fuzzy theory. We classify the selection criteria of critical parts or components into four fuzzy sets and membership functions. A fuzzy inference rule is proposed based on the AHP (Analytic Hierarchy Process) analysis technique so as to derive a convincing reliability test. The credibility of the fuzzy inference system is confirmed through a case study using actual equipment data exacted from an existent weapon system.

Risk Acceptability and Criteria for multiple fatality in Urban disaster (도시재해의 위험성 수용한계와 위험성 범주의 선택)

  • 노삼규
    • Fire Science and Engineering
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    • v.11 no.1
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    • pp.11-19
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    • 1997
  • The paper review of the methods used to present in a quantitative way of risk to the public in the vicinity of hazardous operation within urban area. The study concentrated on the calculation, presentation and interpretation of societal risk where multiple concerned population at large. It is also compared the way to use of risk criterias in various countries where the different population density concerned. It is recommended societal risk criteria need to be vastly apply to the exposed population.

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