A self-testing cloud model for multi-criteria group decision making

2016 ◽  
Vol 33 (6) ◽  
pp. 1767-1783 ◽  
Author(s):  
Ting-Cheng Chang ◽  
Hui Wang

Purpose – The purpose of this paper is to select the best scaling coefficient during the quantitative-qualitative conversion. Design/methodology/approach – Cloud model can describe the qualitative concept of randomness and fuzziness, achieve uncertain transition between qualitative and quantitative in the field of multi-criteria group decision and has been receiving widespread attention. This paper discusses scale conversion issues of the cloud model when evaluating qualitative information. In order to improve the accuracy of the evaluation on multi-attribute decision problems based on uncertainty of natural linguistic information, this paper proposes a method of self-testing cloud model based on a composite scale (with the exponential scale and the scale as a basis). Findings – Through experimental verification results show that under composite scale, the best suitable selection of can effectively improve the accuracy and reliability of decision results. Originality/value – This research presents a new approach to determine the suitable value for coefficient based on uncertain knowledge of natural multi-criteria group decision making, and gives concrete steps and examples. This method has positive significance to improve the quality of qualitative and quantitative conversion based on cloud model.

2020 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Shuang Yao ◽  
Yan Song ◽  
Yanna Yu ◽  
Benhai Guo

Purpose Green technology adoption (GTA) in small and micro enterprises (SMEs) is a complex multi-attribute group decision-making issue. Conflicts of opinions can hamper the achievement of group coherence. The purpose of this paper is to solve the conflict decision-making problem in SMEs. Design/methodology/approach This paper reconstructs the GTA evaluation index system for SMEs and proposes an intragroup coordination relationship model to mitigate group decision-making conflicts based on the cloud model and social networks (GCS). The numerical characteristics of these GTA indicators are determined using fuzzy theory and cloud model. Findings It was found that establishing a trust relationship network and a conflict coordination relationship could improve the consistency of group decision-making. The degree of coordination has subtle differences with the trust relationship. Particularly, the coordination relationship has obvious influences on the decision-making results among small groups in SMEs. Originality/value The conflict coordination model can significantly improve the consistency of group decision-making in SMEs. At the same time, it discusses the differences between the level of conflict coordination and the trust propagation in the process of group decision-making.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Crecencia Godfrey Tarmo ◽  
Faisal H. Issa

PurposeGroupthink happens in-group decision-making processes whereby members of a group prematurely arrive at a decision that may indicate consensus but for the aim of protecting group harmony. This limits the contributions of the individuals' talents, ideas, competences and experiences to more effective decisions. Although there are a number of studies on predictors (forecasters) of groupthink, they do not consider the influence of the African cultural aspects of collectivism, high power distance and tolerance on groupthink that may characterise the decision-making context in African settings. It is in that context that this case study analyses groupthink in a public sector organization in Tanzania.Design/methodology/approachThis paper unveils the presence of groupthink predictors that can affect the quality of decisions made in groups within the Tanzania context. The study was conducted in one of the public institutions in Tanzania that is under the Ministry of Home affairs. The study population included Directors, Managers, Heads of units, District registration officers and other officials as shown in Table 1. These are the people who participate in decision-making processes in the organization and were drawn from different offices of the organization including the headquarter office, Kibaha Data centre, District Registration offices from different regions including Dares Salaam, Coast region, Arusha, Mtwara, Mwanza, Manyara, Mbeya, Singida, Dodoma, Geita, Lindi and Njombe – these 12 administrative regions are among the 27 regions that make up the Tanzania mainland. Through simple random and purposive sampling methods, a total of 97 participants participated effectively. The criterion for participation being participants must have been involved with at least one decision-making group experience. The choice of the organization was done on the basis that it is a relatively a new institution of importance; it was also possible to get from it the needed data.FindingsThe results of the study show that there is the presence of groupthink predictors of high trust, conformity and promotional leadership in decision-making groups in the organization. Furthermore, the diversity of group members alone indicates to be insufficient reason to avoid Groupthink. It is suggested that other important factors might be at play in group decision making including the influence of African cultural characteristics.Research limitations/implicationsThis study was limited to only one institution. For a study of this nature to be undertaken access to data could be a very significant problem. Limiting it to one organization we are familiar with made it a bit easy to achieve access.Practical implicationsGroup decision making and groupthink are rarely in discourse in Africa. Tanzania is not isolated from the world, and being a country that unity is a cultural tenet that is promoted at every level from the family to national level (Rwegelera, 2003; Tripp, 1999) effects of groupthink is reasonably conspicuous because of the inbuilt national culture that has shaped people to be tolerant and accepting of different perspectives, ethnic groups, religious and races (Tripp, 1999). The same tolerance and acceptance may be transferred to decision-making groups and easily cause the occurrence of groupthink that can affect the quality of decisions made.Social implicationsThe Tanzania government has dedicated itself to putting strict measures to prohibit unethical and erroneous decisions that cost the nation including reducing employees' misconduct. The findings of this study indicate that there are hidden aspects like groupthink that are not reached by those measures yet ironically impacts the decisions made in organizations and in turn costs organizations and the country at large and calls for the government and its institutions together with the private sector to be awakened and alerted if they are dedicated and concerned about the quality of decisions they make.Originality/valueThis is an original research work building on previous research. Some findings on groupthink and implications have Western origins. In Africa, we need to figure out what is making the continent not to make significant steps to change the social-economic environment. This study highlights to both African academics and leaders with no management background to make them understand groupthink as a phenomena that has implications to quality decisions. It will also prompt similar studies and therefore widen understanding on decisions making.


2016 ◽  
Vol 54 (7) ◽  
pp. 1649-1668 ◽  
Author(s):  
Petru Lucian Curseu ◽  
Sandra G. L. Schruijer ◽  
Oana Catalina Fodor

Purpose – The purpose of this paper is to test the influence of collaborative and consultative decision rules on groups’ sensitivity to framing effect (FE) and escalation of commitment (EOC). Design/methodology/approach – In an experimental study (using a sample of 233 professionals with project management experience), the authors test the effects of collaborative and consultative decision rules on groups’ sensitivity to EOC and FE. The authors use four group decision-making tasks to evaluate decision consistency across gain/loss framed decision situations and six decision tasks to evaluate EOC for money as well as time as resources previously invested in the initial decisions. Findings – The results show that the collaborative decision rule increases sensitivity to EOC when financial resources are involved and decreases sensitivity to EOC when time is of essence. Moreover, the authors show that the collaborative decision rule decreases sensitivity to FE in group decision making. Research limitations/implications – The results have important implications for group rationality as an emergent group level competence by extending the insights concerning the impact of decision rules on emergent group level cognitive competencies. Due to the experimental nature of the design, the authors can probe the causal relations between the investigated variables, yet the authors cannot generalize the results to other settings. Practical implications – Managers can use the insights of this study in order to optimize the functioning of decision-making groups and to reduce their sensitivity to FEs and EOC. Originality/value – The study extends the research on group rationality and it is one of the few experimental attempts used to understand the role of decision rules on emergent group level rationality.


Author(s):  
Rajali Maharjan ◽  
Shinya Hanaoka

Purpose The purpose of this paper is to reveal the importance of the order of establishment of temporary logistics hubs (TLHs) when resources (mobile storage units used as TLHs) are limited and to present the development and implementation of a methodology that determines the order of establishment of TLHs to support post-disaster decision making. Design/methodology/approach It employed a decision support system that considers multiple decision makers and subjective attributes, while also addressing the impreciseness inherent in post-disaster decision making for ordering the establishment of TLHs. To do so, an optimization model was combined with a fuzzy multi-attribute group decision making approach. A numerical illustration was performed using data from the April 2015 Nepal Earthquake. Findings The results showed the location and order of establishment of TLHs, and demonstrated the impact of decision makers’ opinions on the overall ordering. Research limitations/implications The study does not discuss the uncertain nature of the location problem and the potential need for relocation of TLHs. Practical implications This methodology offers managerial insights for post-disaster decision making when resources are limited and their effective utilization is vital. The results highlight the importance of considering the opinions of multiple actors/decision makers to enable coordination and avoid complication between the growing numbers of humanitarian responders during disaster response. Originality/value This study introduces the concept of the order of establishment of TLHs and demonstrates its importance when resources are limited. It develops and implements a methodology determining the order of establishment of TLHs to support post-disaster decision making.


2020 ◽  
Author(s):  
Teimuraz Tsabadze

The purpose of this chapter is to introduce a new approach for an assessment of the credit risks. The initial part of the chapter is to briefly discuss the existing models of assessment of the credit risks and justify the need for a new approach. Since a new approach is created for conditions of uncertainty, we cannot do without fuzzy mathematics. The proposed approach is based on group decision-making, where experts’ opinions are expressed by trapezoidal fuzzy numbers. The theoretical basis of the offered approach is laid out in the metric space of trapezoidal fuzzy numbers. The new approach is introduced and discussed, and two realization algorithms are given. The toy example of application of the introduced approach is offered as well.


2008 ◽  
Vol 44-46 ◽  
pp. 267-274
Author(s):  
Hao Bo Qiu ◽  
Chao Yong Zhang ◽  
Ping Jiang ◽  
Xin Yu Shao

Group decision-making is one of the most important issues in product development. In order to tackle the vague and sometimes conflicting decision data, this paper presents a new approach based on fuzzy similarity and fuzzy compromise to deal with the fuzzy nature of group decisions. In the proposed method, a modified fuzzy Analytical Hierarchy Process method is used to get the criterion weights, a novel consensus aggregation algorithm is given to obtain the conflict-free results, and an improved compromise decision means is utilized to calculate the utilities of alternatives. Finally an integrated product development solution evaluation process is illustrated as a numerical example, and the corresponding software package is also developed.


2014 ◽  
Vol 24 (1) ◽  
pp. 171-192 ◽  
Author(s):  
Jian-qiang Wang ◽  
Juan-juan Peng ◽  
Hong-yu Zhang ◽  
Tao Liu ◽  
Xiao-hong Chen

Symmetry ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 640 ◽  
Author(s):  
Xu Libo ◽  
Li Xingsen ◽  
Pang Chaoyi ◽  
Guo Yan

In this paper, a new approach and framework based on the interval dependent degree for multi-criteria group decision-making (MCGDM) problems with simplified neutrosophic sets (SNSs) is proposed. Firstly, the simplified dependent function and distribution function are defined. Then, they are integrated into the interval dependent function which contains interval computing and distribution information of the intervals. Subsequently, the interval transformation operator is defined to convert simplified neutrosophic numbers (SNNs) into intervals, and then the interval dependent function for SNNs is deduced. Finally, an example is provided to verify the feasibility and effectiveness of the proposed method, together with its comparative analysis. In addition, uncertainty analysis, which can reflect the dynamic change of the final result caused by changes in the decision makers’ preferences, is performed in different distribution function situations. That increases the reliability and accuracy of the result.


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