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A flexible consensus scheme for multicriteria group decision making under linguistic assessments

PARREIRAS, R. O.; EKEL, P. Ya.; MARTINI, J. S. C.; PALHARES, R. M.
Fonte: ELSEVIER SCIENCE INC Publicador: ELSEVIER SCIENCE INC
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
87.68989%
The present paper proposes a flexible consensus scheme for group decision making, which allows one to obtain a consistent collective opinion, from information provided by each expert in terms of multigranular fuzzy estimates. It is based on a linguistic hierarchical model with multigranular sets of linguistic terms, and the choice of the most suitable set is a prerogative of each expert. From the human viewpoint, using such model is advantageous, since it permits each expert to utilize linguistic terms that reflect more adequately the level of uncertainty intrinsic to his evaluation. From the operational viewpoint, the advantage of using such model lies in the fact that it allows one to express the linguistic information in a unique domain, without losses of information, during the discussion process. The proposed consensus scheme supposes that the moderator can interfere in the discussion process in different ways. The intervention can be a request to any expert to update his opinion or can be the adjustment of the weight of each expert`s opinion. An optimal adjustment can be achieved through the execution of an optimization procedure that searches for the weights that maximize a corresponding soft consensus index. In order to demonstrate the usefulness of the presented consensus scheme...

Agent based simulation for group formation

Marreiros, Goreti; Santos, Ricardo; Ramos, Carlos; Neves, José
Fonte: European Council for Modelling and Simulation (ECMS) Publicador: European Council for Modelling and Simulation (ECMS)
Tipo: Conferência ou Objeto de Conferência
Publicado em /06/2005 Português
Relevância na Pesquisa
78.166313%
Group decision making plays an important role in today’s organisations. The impact of decision making is so high and complex, that rarely the decision making process is made just by one individual. The simulation of group decision making through a Multi-Agent System is a very interesting research topic. The purpose of this paper it to specify the actors involved in the simulation of a group decision, to present a model to the process of group formation and to describe the approach made to implement that model. In the group formation model it is considered the existence of incomplete and negative information, which was identified as crucial to make the simulation closer to the reality.; Fundação para a Ciência e a Tecnologia (FCT) - ArgEmotionAgents - POSI/EIA/56259/2004.

Group decision making applied to preventive maintenance systems

Zanazzi,José Luis; Gomes,Luiz Flávio Autran Monteiro; Dimitroff,Magdalena
Fonte: Sociedade Brasileira de Pesquisa Operacional Publicador: Sociedade Brasileira de Pesquisa Operacional
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2014 Português
Relevância na Pesquisa
98.10451%
This paper describes an application in group decision making, aimed at developing a procedure to help define priorities in preventive maintenance activities. The method applied is called DRV Processes (Decision with Reduction of Variability) and it combines both statistical techniques and multicriteria decision aid procedures. Among its advantages, we may highlight the possibility of reducing the noise affecting information in group decision making and of reaching a consensual decision. This approach generally improves the level of shared knowledge and helps to avoid conflict within the group. The application was carried out in a major pharmaceutical production plant. The experience showed an eighty per cent reduction in the original amount of process noise. Moreover, the paper describes evidence of improvement in interpersonal relationships.

Does group cohesion matter to decision quality in information systems development teams?

Lohan, Garry; Acton, Thomas
Fonte: European, Mediterranean and Middle Eastern Conference on Information Systems (EMCIS) Publicador: European, Mediterranean and Middle Eastern Conference on Information Systems (EMCIS)
Tipo: info:eu-repo/semantics/conferenceObject; all_ul_research; ul_published_reviewed
Português
Relevância na Pesquisa
78.3212%
peer-reviewed; Newer information systems development approaches such as agile methods, which emphasize a sense-and-respond approach, increase the number of operating decisions made regularly within the development team. These methods are being used by an increasing number of organizations as a means of improving the agility of the development process. Development teams are required to make regular group decisions and team members work closely with each other to develop software in time-boxed iterations. However, the literature lacks a clear understanding about how the cohesion of the development teams impacts the decisions made under the time pressures imposed on teams by the agile methodology. There is a paucity of literature examining the impact team cohesion has on the decision-making quality of an agile process. This research-in-progress paper seeks to fill this void by examining the impact the group cohesiveness of decision-making teams have on the relationship between time pressure and decision quality during the software development process. By reviewing and analyzing the literature on group decision making, time pressure, group cohesion and decision quality we begin to develop a group decision-making model for better predicting decision quality based on time pressures and group cohesiveness.

Losing the plot: decision behaviours in agile systems development

Coyle, Sharon; Conboy, Kieran; Acton, Thomas
Fonte: ACIS Publicador: ACIS
Tipo: info:eu-repo/semantics/conferenceObject; all_ul_research; ul_published_reviewed
Português
Relevância na Pesquisa
78.09424%
peer-reviewed; The importance of effective decision making in organisations has been well documented. Groups are often formed in order to collaborate skills and information and assist with decision-making. Despite the many benefits associated with groupwork, groups are also subjected to process losses such as groupthink, which in turn have a significant impact on group decision-making. Such process losses may be even more prevalent in agile software development dominated by highly cohesive, self-managing teams. The purpose of this study is to investigate group decision-making in agile software development and assess how agile practices can reduce the occurrence of group process losses.

Patient preferences for autonomy in decision making in asthma management

Adams, R.; Smith, B.; Ruffin, R.
Fonte: British Med Journal Publ Group Publicador: British Med Journal Publ Group
Tipo: Artigo de Revista Científica
Publicado em //2001 Português
Relevância na Pesquisa
78.145967%
BACKGROUND: Lower patient preferences for autonomy in management decision making during asthma exacerbations have been associated with an increased risk for future hospital admissions. We sought to examine patient preferences for asthma self-management autonomy, and the clinical and psychosocial factors associated with autonomy preferences. METHODS: A cross sectional observational study was performed with data collected between June 1995 and December 1997 of 212 adult patients with moderate to severe asthma managed, at least in part, at two teaching hospitals. Subjects completed a survey of autonomy preferences, quality of life, clinical morbidity and health service use, asthma knowledge, self-efficacy, coping styles, and psychosocial measures. RESULTS: Patients preferred clinicians to assume the major role in most decision making about their management. However, patients wished to remain in control in choosing when to seek care and wanted to share decisions regarding initiating changes in medications during a moderate exacerbation. Multiple regression analysis showed that concerns about adverse effects of medications, education level, an active coping style, perceptions of the propensity of physicians to involve them in treatment decision making...

Group decision making problems in a linguistic and dynamic context

P??rez, I. J.; Cabrerizo, F.J.; Herrera-Viedma, E.
Fonte: Universidade de Granada Publicador: Universidade de Granada
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
98.17012%
The aim of this paper is to present a new model of decision support system for group decision making problems based on a linguistic approach and dynamic sets of alternatives. The model incorporates a mechanism that allows to manage dynamic decision situations in which some information about the problem is not constant in time. We assume that the set of alternatives can change during the decision making process. The model is presented in a mobile and dynamic context where the experts preferences can be incomplete. The linguistic approach is used to represent both the experts preferences about the alternatives and the agreement degrees to manage the change of some alternatives. A prototype of such mobile decision support system in which the experts use mobile devices to provide their linguistic preferences at anytime and anywhere has been implemented. In such a way, we provide a new linguistic group decision making framework that is mobile and dynamic.

Analyzing consensus approaches in fuzzy group decision making: advantages and drawbacks

Cabrerizo, F.J.; Moreno, J. M.; P??rez, I. J.; Herrera-Viedma, E.
Fonte: Universidade de Granada Publicador: Universidade de Granada
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
97.94205%
Two processes are necessary to solve group decision making problems: a consensus process and a selection process. The consensus process is necessary to obtain a nal solution with a certain level of agreement between the experts while the selection process is necessary to obtain such a nal solution. Clearly, it is preferable that the set of experts reach a high degree of consensus before applying the selection process. In order to measure the degree of consensus, different approaches have been proposed. For example, we can use hard consensus measures, which vary between 0 (no consensus or partial consensus) and 1 (full consensus), or soft consensus measures, which assess the consensus degree in a more exible way. The aim of this paper is to analyze the different consensus approaches in fuzzy group decision making problems and discuss their advantages and drawbacks. Additionally, we study the future trends.

A consensus model for group decision making problems with unbalanced fuzzy linguistic information

Cabrerizo, F.J.; Alonso, S.; Herrera-Viedma, E.
Fonte: Universidade de Granada Publicador: Universidade de Granada
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
98.0844%
Most group decision making problems based on linguistic approaches use symmetrically and uniformly distributed linguistic term sets to express experts opinions. However, there exist problems whose assessments need to be represented by means of unbalanced linguistic term sets, i.e., using term sets which are not uniformly and symmetrically distributed. The aim of this paper is to present a consensus model for group decision making problems with unbalanced fuzzy linguistic information. This consensus model is based on both a fuzzy linguistic methodology to deal with unbalanced linguistic term sets and two consensus criteria, consensus degrees and proximity measures. To do so, we use a new fuzzy linguistic methodology improving another approach to manage unbalanced fuzzy linguistic information,1 which uses the linguistic 2-tuple model as representation base of unbalanced fuzzy linguistic information. In addition, the consensus model presents a feedback mechanism to help experts for reaching the highest degree of consensus possible. There are two main advantages provided by this consensus model. Firstly, its ability to cope with group decision making problems with unbalanced fuzzy linguistic information overcoming the problem of finding different discrimination levels in linguistic term sets. And...

Group decision-making with incomplete fuzzy linguistic preference relations

Alonso, S.; Cabrerizo, F.J.; Chiclana, F.; Herrera-Viedma, E.; Herrera, Francisco
Fonte: Universidade de Granada Publicador: Universidade de Granada
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
97.81695%
The aim of this paper is to propose a procedure to estimate missing preference values when dealing with incomplete fuzzy linguistic preference relations assessed using a 2???tuple fuzzy linguistic approach. This procedure attempts to estimate the missing information in an individual incomplete fuzzy linguistic preference relation using only the preference values provided by the respective expert. It is guided by the additive consistency property in order to maintain experts consistency levels. Additionally, we present a selection process of alternatives in group decision making with incomplete fuzzy linguistic preference relations and analyze the use of our estimation procedure in the decision process.

Managing the consensus in group decision making in an unbalanced fuzzy linguistic context with incomplete information

Cabrerizo, F.J.; P??rez, I. J.; Herrera-Viedma, E.
Fonte: Universidade de Granada Publicador: Universidade de Granada
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
98.0844%
To solve group decision making problems we have to take in account different aspects. On the one hand, depending on the problem, we can deal with different types of information. In this way, most group decision making problems based on linguistic approaches use symmetrically and uniformly distributed linguistic term sets to express experts opinions. However, there exist problems whose assessments need to be represented by means of unbalanced linguistic term sets, i.e., using term sets which are not uniformly and symmetrically distributed. On the other hand, there may be cases in which experts do not have an in-depth knowledge of the problem to be solved. In such cases, experts may not put their opinion forward about certain aspects of the problem and, as a result, they may present incomplete information. The aim of this paper is to present a consensus model to help experts in all phases of the consensus reaching process in group decision making problems in an unbalanced fuzzy linguistic context with incomplete information. As part of this consensus model, we propose an iterative procedure using consistency measures to estimate the incomplete information. In addition, the consistency measures are used together with consensus measures to guided the consensus model. The main novelty of this consensus model is that it supports the management of incomplete unbalanced fuzzy linguistic information and it allows to achieve consistent solutions with a great level of agreement.

A mobile decision support system for dynamic group decision making problems

P??rez, I. J.; Cabrerizo, F.J.; Herrera-Viedma, E.
Fonte: Universidade de Granada Publicador: Universidade de Granada
Tipo: Artigo de Revista Científica
Português
Relevância na Pesquisa
98.24976%
The aim of this paper is to present a decision support system model with two important characteristic: (i) mobile technologies are applied in the decision process, and (ii) the set of alternatives is not fixed over time to address dynamic decision situations in which the set of solution alternatives could change throughout the decision making process.We implement a prototype of such mobile decision support system in which experts use mobile phones to provide their preferences anywhere and anytime. In order to get a general system, experts preferences are assumed to be represented by different preference representations: fuzzy preference relations, orderings, utility functions, and multiplicative preference relations. Because this prototype incorporates both selection and consensus processes, it allows to model group decision making situations. The prototype incorporates a tool to manage the changes on the set of feasible alternatives that could happen throughout the decision process. In such a way, the prototype provides a new approach to deal with dynamic group decision making situations to help making decisions anywhere and anytime.

Group decision making for selection of an information system in a business context

Pereira, Teresa; Fontes, Dalila B. M. M.
Fonte: GDRI - Groupement de Recherche International “Algorithmic Decision Theory” Publicador: GDRI - Groupement de Recherche International “Algorithmic Decision Theory”
Tipo: Conferência ou Objeto de Conferência
Publicado em //2012 Português
Relevância na Pesquisa
87.78912%
The main objective of this work is to report on the development of a multi-criteria methodology to support the assessment and selection of an Information System (IS) framework in a business context. The objective is to select a technological partner that provides the engine to be the basis for the development of a customized application for shrinkage reduction on the supply chains management. Furthermore, the proposed methodology di ers from most of the ones previously proposed in the sense that 1) it provides the decision makers with a set of pre-defined criteria along with their description and suggestions on how to measure them and 2)it uses a continuous scale with two reference levels and thus no normalization of the valuations is required. The methodology here proposed is has been designed to be easy to understand and use, without a specific support of a decision making analyst.

Agent based simulation for group formation

Marreiros, Goreti; Santos, Ricardo; Ramos, Carlos; Neves, José
Fonte: Instituto Politécnico do Porto Publicador: Instituto Politécnico do Porto
Tipo: Conferência ou Objeto de Conferência
Publicado em //2005 Português
Relevância na Pesquisa
78.166313%
Group decision making plays an important role in today’s organisations. The impact of decision making is so high and complex, that rarely the decision making process is made just by one individual. The simulation of group decision making through a Multi-Agent System is a very interesting research topic. The purpose of this paper it to specify the actors involved in the simulation of a group decision, to present a model to the process of group formation and to describe the approach made to implement that model. In the group formation model it is considered the existence of incomplete and negative information, which was identified as crucial to make the simulation closer to the reality.

LAID - a smart decision room with ambient intelligence for group decision making and argumentation support considering emotional aspects

Marreiros, Goreti; Santos, Ricardo; Freitas, Carlos Filipe; Ramos, Carlos; Neves, José; Bulas-Cruz, José
Fonte: SERSC Publicador: SERSC
Tipo: Artigo de Revista Científica
Publicado em //2008 Português
Relevância na Pesquisa
88.08523%
Decision Making is one of the most important activities of the human being. Nowadays decisions imply to consider many different points of view, so decisions are commonly taken by formal or informal groups of persons. Groups exchange ideas or engage in a process of argumentation and counter-argumentation, negotiate, cooperate, collaborate or even discuss techniques and/or methodologies for problem solving. Group Decision Making is a social activity in which the discussion and results consider a combination of rational and emotional aspects. In this paper we will present a Smart Decision Room, LAID (Laboratory of Ambient Intelligence for Decision Making). In LAID environment it is provided the support to meeting room participants in the argumentation and decision making processes, combining rational and emotional aspects.

A model for selecting project team members using multicriteria group decision making

Alencar,Luciana Hazin; Almeida,Adiel Teixeira de
Fonte: Sociedade Brasileira de Pesquisa Operacional Publicador: Sociedade Brasileira de Pesquisa Operacional
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2010 Português
Relevância na Pesquisa
78.11104%
Selecting a project team is a complex multi-criteria decision-making problem. For this reason, one appropriate way to tackle such problems involves the use of multi-criteria decision aid methods. However, most of the decisions taken regarding the selection of project teams are made by a group of people. It is this which changes the focus of the problem by moving from one decision-maker (DM) to a group of DMs. Analysis needs to be extended in order to consider the preference structure of each individual group member. In this paper, we present a group decision model for project team selection based on a multi-criteria evaluation of the preferences of a client's representatives. It could be applied to any decision problem since it involves a group of decision makers whose preferences diverge little. An application of the model in order to select consultants for a construction project is presented.

Doodle Around the World: Online Scheduling Behavior Reflects Cultural Differences in Time Perception and Group Decision-Making

Reinecke, Katharina; Nguyen, Minh Khoa; Bernstein, Abraham; Näf, Michael; Gajos, Krzysztof Z
Fonte: ACM Press Publicador: ACM Press
Tipo: Conference Paper
Português
Relevância na Pesquisa
87.89514%
Event scheduling is a group decision-making process in which social dynamics influence people's choices and the overall outcome. As a result, scheduling is not simply a matter of finding a mutually agreeable time, but a process that is shaped by social norms and values, which can highly vary between countries. To investigate the influence of national culture on people's scheduling behavior we analyzed more than 1.5 million Doodle date/time polls from 211 countries. We found strong correlations between characteristics of national culture and several behavioral phenomena, such as that poll participants from collectivist countries respond earlier, agree to fewer options but find more consensus than predominantly individualist societies. Our study provides empirical evidence of behavioral differences in group decision-making and time perception with implications for cross-cultural collaborative work.; Engineering and Applied Sciences

Emotions and Decision-Making Processes in Management Teams: A Collective Level Analysis

Tran,Veronique; Páez,Dario; Sánchez,Flor
Fonte: Revista de Psicología del Trabajo y de las Organizaciones Publicador: Revista de Psicología del Trabajo y de las Organizaciones
Tipo: info:eu-repo/semantics/article; journal article; info:eu-repo/semantics/publishedVersion Formato: text/html; application/pdf
Publicado em 01/04/2012 Português
Relevância na Pesquisa
78.06544%
Discrete emotions are rarely studied in relationship with group decision-making. Using data from 20 simulated companies run by a total of 106 managers attending executive education programs, the current research examined to what extent four classes of emotions (positive achievement, positive approach, negative resignation, and negative antagonistic) were related to team decision-making processes (alternative generation and alternative evaluation). Significant intra-class coefficients confirmed that aggregation of emotion and decision-making processes was feasible. Correlations at the collective or aggregated team level showed that approach emotions were related to alternative generation, particularly in the developing phase of a group decision-making task. Finally, a ratio of positive emotions over negative emotions correlated positively with a better team decision process. Future research extending emotion influence in decision process is suggested, and practical implications are discussed.

Group Decision Making and Graphical Visualization in E–cognocracy

Turón Lanuza,Alberto; Moreno Jiménez,José María; Toncovich,Adrián
Fonte: Centro de Investigación en computación, IPN Publicador: Centro de Investigación en computación, IPN
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/12/2008 Português
Relevância na Pesquisa
98.22465%
E-cognocracy [Moreno-Jiménez, 2003, 2006; Moreno-Jiménez and Polasek, 2003, 2005] is a new democratic system conceived for the purpose of extracting and diffusing the knowledge derived from the scientific resolution of complex problems that arise in the field of public decision making. For both the modelling and resolution of problems and the diffusion of knowledge, e-cognocracy uses multicriteria decision making techniques. Similarly, with the aim of facilitating knowledge extraction, discussion through collaborative tools, the negotiation processes between the actors involved in the resolution of the problem and both individual and collective learning, e- cognocracy employs a wide range of graphical visualization tools. This paper presents a set of procedures oriented towards group decision making, for both a reduced and a high number of actors, which use graphical visualization as starting point in the creation of knowledge all the participants involved in the problem resolution. These procedures show the potential of the graphical visualization tools that have been developed within our research group, the Zaragoza Multicriteria Decision Making Group (GDMZ).

Water network rehabilitation: a group decision-making approach

Morais,Danielle C; Almeida,Adiel T
Fonte: Water SA Publicador: Water SA
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/07/2010 Português
Relevância na Pesquisa
87.79441%
Rehabilitation of water networks is a complex problem which may require a range of different water management actions, involving groups or institutions having differing objectives, responsibilities and interests, and requiring collaboration for conflict resolution. Group decision making can play a vital role in situations where multiple actors are involved, each having their own private perceptions of the context and the decision problem to be tackled. This paper proposes a group decisionmaking model based on an analysis of individual rankings, with the aim of choosing an appropriate alternative which is the best compromise of the points of view of the actors involved in the decision problem. An application with 4 influence groups was conducted based on the proposed method.