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Quality function deployment (QFD) is a customer-driven quality management and product development system for achieving higher customer satisfaction. The QFD process involves various inputs in the form of linguistic data, e.g., human perception, judgment, and evaluation on importance or relationship strength. Such data are usually ambiguous and uncertain. An aim of this paper is to examine the implementation of QFD under a fuzzy environment and to develop corresponding procedures to deal with the fuzzy data. It presented a process model using linguistic variables, fuzzy arithmetic, and defuzzification techniques. Based on an example, this paper further examined the sensitivity of the ranking of technical characteristics to the defuzzification strategy and the degree of fuzziness of fuzzy numbers. Results indicated that selection of the defuzzification strategy and membership function are important. This proposed fuzzy approach allows QFD users to avoid subjective and arbitrary quantification of linguistic data. The paper also presents a scheme to represent and interprete the results. 相似文献
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I. V. Sergienko I. N. Parasyuk M. F. Kaspshitskaya 《Cybernetics and Systems Analysis》2003,39(2):163-173
The problem of optimal choice of a set of parameters is considered in fuzzy formulation. The so-called S-functions (or bell-shaped functions) are used for interpretation of fuzziness. A method of defuzzification of linguistic variables is proposed. Some results on stability are given. 相似文献
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可变粒度的业务质量评价模型及其算法研究 总被引:2,自引:0,他引:2
针对现有的服务质量评价多面向特定业务和特定领域的特点,提出可变粒度的通用网络业务质量管理和评价模型,可以实现从用户、业务到网络系统的多级业务质量评价.同时,由业务管理、策略管理和网络管理共同所组成的服务质量保障模块,能根据SLA协商为用户提供有QoS保障的服务.给出了业务质量的主客观评价指标形式化定义和一般的评价流程,在此基础上采用组合证据和模糊评价理论,给出了不同粒度下的业务质量模糊评价算法.该算法将用户的主观性评价和客观性评价结合起来,从而在一定程度上降低了评价中的主观随意性. 相似文献
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Wei Pan Xianjia Wang Yong-guang Zhong Lean Yu Cao Jie Lun Ran 《International journal of systems science》2013,44(6):1054-1063
Data communication service has an important influence on e-commerce. The key challenge for the users is, ultimately, to select a suitable provider. However, in this article, we do not focus on this aspect but the viewpoint and decision-making of providers for order allocation and pricing policy when orders exceed service capacity. It is a multiple criteria decision-making problem such as profit and cancellation ratio. Meanwhile, we know realistic situations in which much of the input information is uncertain. Thus, it becomes very complex in a real-life environment. In this situation, fuzzy sets theory is the best tool for solving this problem. Our fuzzy model is formulated in such a way as to simultaneously consider the imprecision of information, price sensitive demand, stochastic variables, cancellation fee and the general membership function. For solving the problem, a new fuzzy programming is developed. Finally, a numerical example is presented to illustrate the proposed method. The results show that it is effective for determining the suitable order set and pricing policy of provider in data communication service with different quality of service (QoS) levels. 相似文献
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软件质量的模糊属性及其表示 总被引:10,自引:1,他引:10
软件质量是一个模糊的概念,其主要表现是:软件质量等级通常以某一质量特性的指标值来划分,然而用户对软件质量的评价却是模糊的,为了处理软件质量的模糊属性,提出了3种描述软件质量(子)特性的模糊表示方法,并给出了这些表示方法的示例。 相似文献
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麻风梅 《计算机与数字工程》2011,39(9):161-163
针对现有信息系统在智能评价方面的薄弱之处,该文设计了一个基于Ajax的旅游景区服务质量智能评价系统.在分析Ajax技术的应用框架和构造原理的基础上,进行了智能评价系统的内部功能设计.系统采用B/S+C/S构架,并应用Ajax技术实现了浏览器和服务器之间的异步通信,很好地解决了浏览器阻塞问题. 相似文献
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将累积前景理论的价值函数引入投资组合决策,从行为金融学的角度对传统整数犹豫模糊语言术语集下标进行改进,改进后的可变下标犹豫模糊语言术语集不仅可以反映投资人对金融产品的不确定程度,还能描述投资人给出评价本身时对收益或损失的心理感知.在单投资者多准则评价视角下,利用可变下标的犹豫模糊语言多准则投资组合评价系统对不同股票进行量化评价,针对激进型、稳健型和保守型3类投资者分别提出收益最大化、风险最小化犹豫模糊语言投资组合模型,通过对等价非线性模型求解得到投资组合的最优解.最后,利用数值仿真验证所提出模型和方法的有效性. 相似文献
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With the continuous development of the economy and society, decision-making problems and decision-making scenarios have become more complex. The q-rung orthopair fuzzy set is getting more and more attention from researchers, which is more general and flexible than Pythagorean fuzzy set and intuitionistic fuzzy set under complex vague environment. In this study, the concept of q-rung orthopair fuzzy linguistic set (q-ROFLS) is proposed and a new q-rung orthopair fuzzy linguistic method is developed to handle MAGDM problem. Firstly, the conception, operation laws, comparison methods, and distance measure methods of the q-ROFLS are proposed. Secondly, the q-ROFL weighted average operator, q-ROFL ordered weighted average operator, q-ROFL hybrid weighted average operator, q-ROFL weighted geometric operator, q-ROFL ordered weighted geometric operator, and q-ROFL hybrid weighted geometric operator are proposed, and some interesting properties, special cases of these operators are investigated. Furthermore, a new method to cope with MAGDM problem based on q-ROFL weighted average operator (q-ROFL weighted geometric operator) is developed. Finally, a practical example for suppliers selection is provided to verify the practicality of the presented method, and the effectiveness and flexibility of the presented method are illustrated by sensitive analysis and comparative analysis. 相似文献
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变精度粗糙模糊集模型研究 总被引:1,自引:0,他引:1
介绍了Ziarko’s变精度粗糙集模型和粗糙模糊集模型,找出了它们的不足。基于支集相对错误分类率及误差参数β(0≤β<0.5),提出了变精度粗糙模糊集模型,讨论了模型中β上、下近似算子的性质;分析了该模型与Ziarko’s变精度粗糙集模型和粗糙模糊集模型的关系;最后给出了该模型中近似约简的定义和方法,并通过实例分析说明了约简算法的有效性。 相似文献
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基于模糊语言的信息系统事前评价模型 总被引:3,自引:0,他引:3
给出了信息系统事前评价的指标体系.针对信息系统事前评价指标的不确定性,提出使用语言值对指标进行评价,并给出了一种基于模糊语言的信息系统事前评价模型.由决策者给出语言判断矩阵,使用EOWA算子进行集结,并求得各方案的综合属性值,对方案进行择优,为信息化建设提供决策支持. 相似文献
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现有的矿井通风系统健康评价方法大多采用常权权重,评价结果易与实际背离,无法反映系统真实状态,同时选取的指标较多,各指标权重较低,导致部分指标异常对系统整体健康程度的影响难以发现。基于矿井通风系统实际运行状况及健康评价要求,选取21项影响因素作为健康评价指标,构建矿井通风系统健康评价指标体系;综合运用模糊综合评价法、层次分析法、变权理论,对矿井通风系统进行健康评价,即通过层次分析法确定评价指标权重,采用基于隶属度的Hardarmard乘积变权模型对指标权重进行变权计算,基于模糊综合评价法的最大隶属度评定准则确定矿井通风系统健康度。采用该方法对某煤矿通风系统健康度进行评价,结果表明该方法的评价结果与实际情况相符,与基于常权权重的评价方法相比,可根据实际情况调整评价指标权重,使评价结果更加客观,且放大了不健康指标的影响,突出系统安全隐患,从而引起相关人员重视。 相似文献
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Automatic summary of databases is an important tool in strategic decision-making. This paper presents the application of linguistic summaries to outlier detection in databases containing both text and numeric attributes. The proposed method applies Yager’s standard summary based on interval-valued fuzzy sets. Fuzzy similarity measures are the features which are looked for. Detection of outliers can identify defects, remove impurities from the data, and, most of all, it may provide the basis for decision-making processes. In this paper, we introduce a definition of an outlier based on linguistic summaries. Feasibility of the method is demonstrated on practical examples. 相似文献
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随着信息化的发展,“信息孤岛”成为阻碍跨部门、跨域信息资源共享的主要问题,而解决这个问题的关键技术就是互操作.不同部门之间实现互操作的前提是建立良好的信任关系.以信息系统互操作为背景,从组织信任关系的角度,对互操作的信任机制进行了研究.在构建互操作联盟的基础上,一方面,从组织信任关系背景下,分析了影响互操作信任的定性和定量的因素,建立了互操作信任评价指标体系;另一方面,为符合互操作局部自治和动态变化的特点,研究了基于模糊变权理论的互操作信任动态综合评价方法.最后,通过仿真对上述研究内容的可行性进行了验证.通过分析证明该方法能够实现互操作信任的动态变化以及基于信任的互操作逻辑重构. 相似文献
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The aim of the presented paper is to give a multiattribute decision making (MADM) method under the linguistic intuitionistic fuzzy (LIF) environment using the set pair analysis (SPA) theory. LIF set can express the qualitative information in terms of linguistic variables, whereas the connection number (CN) based on the “identity,” “discrepancy,” and “contrary” degrees of the SPA theory handles the uncertainties and certainties systems. On the basis of these features, we develop some series of linguistic CN (LCN) power weighted and ordered weighted geometric aggregation operator to aggregate the different LCNs. Several properties of the operators are also studied. Afterward, we present a novel MADM method to solve decision‐making problems under LIF set environment and illustrate with several examples to validate it. A comparative analysis is also presented to show the results. 相似文献
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In this study, the concept of linguistic Z-number fuzzy soft set ( ) is proposed to describe multiple uncertainties in practical decision making problems. combines the concepts of fuzzy soft set, linguistic Z-number, and soft set, which could reflect both of the uncertainty in structure and the uncertainty in detailed evaluations. As an initial idea, the set operations on are put forward, the properties of such operations are also discussed. With traditional soft set based decision procedure and fuzzy soft set based decision procedure, a novel linguistic Z-number fuzzy soft set based group decision procedure is developed to solve multiattribute group decision making with linguistic Z-numbers. Wherein an extended technique for order preference by similarity to ideal solution is also developed. Finally, a numerical example is shown to illustrate the practicality and effectiveness of the given method. 相似文献
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麻风梅 《计算技术与自动化》2010,29(3):117-119
针对传统描述性评价方法存在的主观、片面和不准确的问题,利用模糊评价技术,设计一个基于网络的旅游景区服务质量智能评价系统。该系统首先在广泛收集游客反馈意见的基础上,经过专家系统的推理把反馈意见影射到评价指标,然后通过分层的模糊运算得到评价结果。系统采用B/S+C/S构架实现,并利用Web技术提高人机交互界面的智能化。 相似文献
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为了提高"质量工程"项目评审的科学性,本文设计一个智能评价管理系统。根据评价因素的模糊性,采用模糊综合评判方法处理"质量工程"项目申报、中期检查、结题验收的评审问题,保证评价的科学性和公正性,提高管理效率和服务水平。 相似文献