Importance measures for degrading components based on cooperative game theory

2019 ◽  
Vol 37 (2) ◽  
pp. 189-206
Author(s):  
Yingsai Cao ◽  
Sifeng Liu ◽  
Zhigeng Fang
Keyword(s):  
Cooperative Game ◽  
Shapley Value ◽  
System Reliability ◽  
Design Methodology ◽  
System Structure ◽  
Importance Measure ◽  
Engineering Systems ◽  
Content Type ◽  
Timely Feedback ◽  
Degradation Models

Purpose The purpose of this paper is to propose new importance measures for degrading components based on Shapley value, which can provide answers about how important players are to the whole cooperative game and what payoff each player can reasonably expect. Design/methodology/approach The proposed importance measure characterizes how a specific degrading component contributes to the degradation of system reliability by using Shapley value. Degradation models are also introduced to assess the reliability of degrading components. The reliability of system consisting independent degrading components is obtained by using structure functions, while reliability of system comprising correlated degrading components is evaluated with a multivariate distribution. Findings The ranking of degrading components according to the newly developed importance measure depends on the degradation parameters of components, system structure and parameters characterizing the association of components. Originality/value Considering the fact that reliability degradation of engineering systems and equipment are often attributed to the degradation of a particular or set of components that are characterized by degrading features. This paper proposes new importance measures for degrading components based on Shapley value to reflect the responsibility of each degrading component for the deterioration of system reliability. The results are also able to give timely feedback of the expected contribution of each degrading component to system reliability degradation.

Bounds for increasing multi-state linear k-within-(r,s)-of-(m,n):F lattice system

2018 ◽  
Vol 35 (5) ◽  
pp. 1142-1156
Author(s):  
Taha Radwan
Keyword(s):  
Complex System ◽  
Mobile Communications ◽  
System Reliability ◽  
Design Methodology ◽  
Lattice System ◽  
Content Type ◽  
Numerical Examples ◽  
Oil Pipeline ◽  
Special Cases ◽  
Practical Implications

Purpose A multi-state linear k-within-(r, s)-of-(m, n): F lattice system consists of m×n components arranged in m rows and n columns. The possible states of the system and its components are: 0, 1, 2, …, H. According to k values, the system can be categorized into three special cases: decreasing, increasing and constant. The system reliability of decreasing and constant cases exists. The purpose of this paper is to evaluate the system reliability in increasing case with i.i.d components, where there is no any algorithm for evaluating the system reliability in this case. Design/methodology/approach The Boole-Bonferroni bounds were applied for evaluating the reliability of many systems. In this paper, the author reformulated the second-order Boole-Bonferroni bounds to be suitable for the evaluation of the multi-state system reliability. And the author applied these bounds for deriving the lower bound and upper bound of increasing multi-state linear k-within-(r, s)-of-(m, n): F lattice system. Findings An illustrated example of the proposed bounds and many numerical examples are given. The author tested these examples and concluded the cases that make the new bounds are sharper. Practical implications In this paper, the author considered an important and complex system, the multi-state linear k-within-(r, s)-of-(m, n): F lattice system; it is a model for many applications, for example, telecommunication, radar detection, oil pipeline, mobile communications, inspection procedures and series of microwave towers systems. Originality/value This paper suggests a method for the computation of the bounds of increasing multi-state linear k-within-(r,s)-of-(m,n): F lattice system. Furthermore, the author concluded that the cases that make these bounds are sharper.

Public resources allocation using an uncertain cooperative game among vulnerable groups

Kybernetes ◽  
2019 ◽  
Vol 48 (8) ◽  
pp. 1606-1625 ◽  
Author(s):  
Pei Liang ◽  
Junhua Hu ◽  
Yongmei Liu ◽  
Xiaohong Chen
Keyword(s):  
Resource Allocation ◽  
Cooperative Game ◽  
Shapley Value ◽  
Choquet Integral ◽  
Convex Combination ◽  
Integral Form ◽  
Vulnerable Groups ◽  
Content Type ◽  
Public Resource ◽  
Public Resources

Purpose This paper aims to solve the problem of public resource allocation among vulnerable groups by proposing a new method called uncertain α-coordination value based on uncertain cooperative game. Design/methodology/approach First, explicit forms of uncertain Shapley value with Chouqet integral form and uncertain centre-of-gravity of imputation-set (CIS) value are defined separately on the basis of uncertainty theory and cooperative game. Then, a convex combination of the two values above called the uncertain α-coordination value is used as the best solution. This study proves that the proposed methods meet the basic properties of cooperative game. Findings The uncertain α-coordination value is used to solve a public medical resource allocation problem in fuzzy coalitions and uncertain payoffs. Compared with other methods, the α-coordination value can solve such problem effectively because it balances the worries of vulnerable group’s further development and group fairness. Originality/value In this paper, an extension of classical cooperative game called uncertain cooperative game is proposed, in which players choose any level of participation in a game and relate uncertainty with the value of the game. A new function called uncertain α-Coordination value is proposed to allocate public resources amongst vulnerable groups in an uncertain environment, a topic that has not been explored yet. The definitions of uncertain Shapley value with Choquet integral form and uncertain CIS value are proposed separately to establish uncertain α-Coordination value.

A model for reliability analysis of multi-state manufacturing systems

2014 ◽  
Vol 31 (8) ◽  
pp. 938-949 ◽  
Author(s):  
Seyed Ahmad Niknam ◽  
Rapinder Sawhney
Keyword(s):  
Reliability Analysis ◽  
System Reliability ◽  
Design Methodology ◽  
Manufacturing Systems ◽  
Manufacturing System ◽  
Production Systems ◽  
Case Scenario ◽  
Worst Case ◽  
Content Type ◽  
Proposed Model

Purpose – The purpose of this paper is to investigate the reliability analysis of a multi-state manufacturing system with different performance levels. In, fact, reliability assessment of manufacturing systems gives a reasonable demonstration of system performance. Design/methodology/approach – This research utilizes a multi-state system reliability analysis to develop a new metric for evaluating production systems. Findings – The proposed model provides a sensible measure to assess the system situation against the best-case scenario of a production line. Originality/value – The proposed model incorporates not only failures that stop production but also deals with partial failures where the system continues to operate at reduced performance rates. The analyses are represented in a best-case vs worst-case situation. Each of these cases provides insight for managers with respect to planning operation and maintenance activities.

Cooperative game-based profit allocation for joint distribution alliance under online shopping environment

2019 ◽  
Vol 31 (2) ◽  
pp. 302-326 ◽  
Author(s):  
Longxiao Li ◽  
Xu Wang ◽  
Yun Lin ◽  
Fuli Zhou ◽  
Shan Chen
Keyword(s):  
Cooperative Game ◽  
Shapley Value ◽  
Environmental Sustainability ◽  
Joint Distribution ◽  
Online Shopping ◽  
Sharing Economy ◽  
Service Market ◽  
Content Type ◽  
Logistics Service ◽  
Profit Allocation

PurposeIn the context of sharing economy and online shopping, establishing a stable urban joint distribution alliance (JDA) is extremely necessary for the entire logistics service market. The purpose of this paper is to rationally allocate the profits and determine the most stable allocation scheme for the urban JDA as well as provide a direction for cooperation between express enterprises and lead managers to pay more attention to the comprehensive performance.Design/methodology/approachCooperative game-based methodologies including the proportion method, the core theory, nucleolus and Shapley value have been employed. Four criteria consisting of enterprise operation, customer satisfaction, environmental sustainability and information technology have been incorporated into Shapley value for improvement.FindingsThis paper reveals that express enterprises in logistics service market can achieve more benefit from JDA than those who operate separately. Among proposed profit allocation schemes, improved Shapley value scheme shows more rationality by considering partners’ asymmetric contribution. Besides, a stable alliance can be always ensured with partners’ lower propensity to disrupt and relatively balanced negotiation power under improved Shapley value scheme.Originality/valueThis paper makes a few attempts to contribute to the literature on the improvement of Shapley value and applies the concept of “propensity to disrupt” into the field of logistics. Besides, this paper provides various profit allocation schemes and incorporates influencing factors into Shapley value for an improvement thus helping policy-makers make better-informed decisions on urban distribution. Additionally, a case study based on urban express enterprises in Southwest China has been conducted to verify the proposed profit allocation schemes.

Scale up predictive models for early detection of at-risk students: a feasibility study

2020 ◽  
Vol 121 (3/4) ◽  
pp. 97-116
Author(s):  
Ying Cui ◽  
Fu Chen ◽  
Ali Shiri
Keyword(s):  
Student Performance ◽  
Predictive Models ◽  
General Model ◽  
Design Methodology ◽  
Model Building ◽  
At Risk Students ◽  
Scale Up ◽  
Content Type ◽  
Timely Feedback ◽  
Using Data

Purpose This study aims to investigate the feasibility of developing general predictive models for using the learning management system (LMS) data to predict student performances in various courses. The authors focused on examining three practical but important questions: are there a common set of student activity variables that predict student performance in different courses? Which machine-learning classifiers tend to perform consistently well across different courses? Can the authors develop a general model for use in multiple courses to predict student performance based on LMS data? Design/methodology/approach Three mandatory undergraduate courses with large class sizes were selected from three different faculties at a large Western Canadian University, namely, faculties of science, engineering and education. Course-specific models for these three courses were built and compared using data from two semesters, one for model building and the other for generalizability testing. Findings The investigation has led the authors to conclude that it is not desirable to develop a general model in predicting course failure across variable courses. However, for the science course, the predictive model, which was built on data from one semester, was able to identify about 70% of students who failed the course and 70% of students who passed the course in another semester with only LMS data extracted from the first four weeks. Originality/value The results of this study are promising as they show the usability of LMS for early prediction of student course failure, which has the potential to provide students with timely feedback and support in higher education institutions.

A hybrid meta-heuristic scheduler algorithm for optimization of workflow scheduling in cloud heterogeneous computing environment

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Reza Noorian Talouki ◽  
Mirsaeid Hosseini Shirvani ◽  
Homayon Motameni
Keyword(s):  
Genetic Algorithm ◽  
Simulated Annealing ◽  
Design Methodology ◽  
Heterogeneous Computing ◽  
Hybrid Approach ◽  
Heuristic Optimization ◽  
Workflow Scheduling ◽  
Engineering Systems ◽  
Computing Environment ◽  
Content Type

Purpose Improvement of workflow scheduling in distributed engineering systems Design/methodology/approach The authors proposed a hybrid meta heuristic optimization algorithm. Findings The authors have made improvement in hybrid approach by exploiting of genetic algorithm and simulated annealing plus points. Originality/value To the best of the authors’ knowledge, this paper presents a novel theorem and novel hybrid approach.

Time-varying importance measure of mechanical systems considering maintenance

2019 ◽  
Vol 36 (9) ◽  
pp. 3094-3107
Author(s):  
Yangfan Li ◽  
Yingjie Zhang ◽  
Lin Zhang ◽  
Bochao Dai
Keyword(s):  
Design Methodology ◽  
Manufacturing System ◽  
Importance Measure ◽  
Time Varying ◽  
Cnc Machine Tool ◽  
Cnc Machine ◽  
Content Type ◽  
Component Importance ◽  
Maintenance Time ◽  
Maintenance Work

Purpose The purpose of this paper is to analyze the changes in its importance due to the maintenance and repair of components. Design/methodology/approach In this paper, a concept of time-varying importance measure is proposed to solve the problem of component importance change caused by maintenance. When the system is broken-down, the probability difference between the component works well after repairing and the component break down before repairing is solved, this difference is measured as an index of time-varying importance method. Then, the approach has been verified by the CNC machine tool. Findings The paper provides a method to analyze the importance of changes of components in the system due to maintenance. The time-varying importance measure can evaluate the component importance anytime during its whole life span, and it has the ability to find out the most responsible component for a system failure in the actual production process. What is more, it provides guidance for the next maintenance work. Originality/value The proposed method can guide the next maintenance time according to the change of component performance caused by each maintenance activity of the manufacturing system, and avoid the waste of resources caused by repeated maintenance.

scholarly journals Multiplayer online role-playing as information retrieval and system use: an ethnographic study

2018 ◽  
Vol 74 (3) ◽  
pp. 624-640 ◽  
Author(s):  
J. Tuomas Harviainen ◽  
Amon Rapp
Keyword(s):  
Information Retrieval ◽  
Information Systems ◽  
Design Methodology ◽  
Role Playing ◽  
Ethnographic Study ◽  
System Structure ◽  
Access To Information ◽  
Content Type ◽  
System Use ◽  
Task Efficiency

Purpose The purpose of this paper is to expand the research of games as information systems. It illustrates how significant parts of massively multiplayer online role-playing function like information retrieval from a library database system. Design/methodology/approach By combining ideas from earlier contributions on the topics of game environments as information systems, the paper explores how gameplay connects to information retrieval, restricted content access, and information system structure. The paper then proceeds to examine this idea through an ethnographic study conducted in World of Warcraft during 2012-2016. Findings By discussing how multiplayer digital game play is a form of information retrieval, the paper shows that players enjoy the well-restricted access to information that is a constitutive element of gameplay. Examining controlled access, procedural literacies and emphatic keywords, the paper finds that content relevances and system use may be influenced by hedonic concerns rather than task efficiency. Originality/value The study of retrieval issues related to gaming enriches our knowledge on inferences in retrieval. It shows that people may prefer that their access to information be limited, in order to make system use more interesting.

scholarly journals Vulnerable adults in police custody

2019 ◽  
Vol 22 (1) ◽  
pp. 5-8
Author(s):  
Ian Cummins
Keyword(s):  
Design Methodology ◽  
Research Literature ◽  
Police Custody ◽  
England And Wales ◽  
Content Type ◽  
Increased Risk ◽  
Vulnerable Adults

Purpose The purpose of this paper is to discuss the recent National Appropriate Adult Network (NAAN) report on the role of the appropriate adult. Design/methodology/approach This paper is based on the NAAN report and a review of relevant policy and research literature. Findings There to Help 2 highlights that there are still significant gaps in the provision of appropriate adult schemes across England and Wales. These gaps potentially place vulnerable adults at increased risk. Originality/value This paper is a review of recent research.

Co-workers’ perceptions of and reactions to employee’s involuntary demotion

2019 ◽  
Vol 41 (4) ◽  
pp. 740-757 ◽  
Author(s):  
Sophie Hennekam ◽  
Subramaniam Ananthram ◽  
Steve McKenna
Keyword(s):  
Design Methodology ◽  
Emotional Responses ◽  
Emotional Reaction ◽  
Content Type ◽  
Informational Justice ◽  
Behavioural Responses ◽  
Behavioural Reaction ◽  
Three Stages ◽  
Depth Interviews ◽  
The Way

Purpose The purpose of this paper is to investigate how individuals perceive and react to the involuntary demotion of a co-worker in their organisation. Design/methodology/approach The authors draw on 46 semi-structured in-depth interviews (23 dyads) with co-workers of demoted individuals. Findings The findings suggest that an individual’s observation of the demotion of a co-worker has three stages: their perception of fairness, their emotional reaction and their behavioural reaction. The perception of fairness concerned issues of distributive, procedural, interpersonal and informational justice. The emotional responses identified were feelings of disappointment/disillusion, uncertainty, vulnerability and anger. Finally, the behavioural reactions triggered by their emotional responses included expressions of voice, loyalty, exit and adaptation. Originality/value Perceptions of (in)justice perpetrated on others stimulate emotional and behavioural responses, which impacts organisational functioning. Managers should therefore pay attention to the way a demotion is perceived, not only by those directly concerned, but also by co-workers as observers.

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