UTA methods

International Series in Operations Research and Management Science

Volumn 78, Issue , 2005, Pages 297-343

  Siskos, Yannis ^a   Grigoroudis, Evangelos ^b   Matsatsinis, Nikolaos F ^b  

^a UNIVERSITY OF PIRAEUS   (Greece)

^b TECHNICAL UNIVERSITY OF CRETE   (Greece)

Author keywords

Additive utility; Multicriteria analysis; Ordinal regression; Preference disaggregation; UTA methods

Indexed keywords

EID: 84955111087     PISSN: 08848289     EISSN: None     Source Type: Book Series    
DOI: 10.1007/0-387-23081-5_8     Document Type: Chapter

References (122)

1. S. Angilella, S. Greco, F. Lamantia, and B. Matarazzo. Assessing non-additive utility for multicriteria decision aid. European Journal of Operational Research, in press, 2003.
2. C.A. Bana e Costa, F. Nunes Da Silva, and J.C. Vansnick. Conflict dissolution in the public sector: A case-study. European Journal of Operational Research, 130(2):388–401, 2001.
3. C.A. Bana e Costa and J.C. Vansnick. MACBETH: An interactive path towards the construction of cardinal value functions. International Transactions in Operations Research, 1(4):489–500, 1994.
4. C.A. Bana e Costa and J.C. Vansnick. Applications of the MACBETH approach in the framework of an additive aggregation model. Journal of Multi-Criteria Decision Analysis, 6(2):107–114, 1997.
5. G. Baourakis, N.F. Matsatsinis, and Y. Siskos. Agricultural product design and development. In J. Janssen and C.H. Skiadas, editors, Applied stochastic models and data analysis, pages 1108–1128. World Scientific, Singapore, 1993.
6. G. Baourakis, N.F. Matsatsinis, and Y. Siskos. Consumer behavioural analysis using multicriteria methods. In J. Janssen, C.H. Skiadas, and C. Zopounidis, editors, Advances in stochastic modelling and data analysis, pages 328–338. Kluwer Academic Publishers, Dordrecht, 1995.
7. G. Baourakis, N.F. Matsatsinis, and Y. Siskos. Agricultural product development using multidimensional and multicriteria analyses: The case of wine. European Journal of Operational Research, 94(2):321–334, 1996.
8. M. Beuthe, L. Eeckhoudt, and G. Scanella. A practical multicriteria methodology for assessing risky public investments. Socio-Economic Planning Sciences, 34(2):121–139, 2000.
9. M. Beuthe and G. Scannella. Applications comparées des méthodes d’analyse multicritère UTA. RAIRO Recherche Opérationelle, 30(3):293–315, 1996.
10. M. Beuthe and G. Scannella. MUSTARD User’s Guide. GTM, Facultés Universitaires Catholiques de Mons (FUCaM), Mons, 1999.
11. M. Beuthe and G. Scannella. Comparative analysis of UTA multicriteria methods. European Journal of Operational Research, 130(2):246–262, 2001.
12. T.X. Bui. Co-oP: A Group Decision Support System for Cooperative Multiple Criteria Group Decision Making, volume 290 of Lecture Notes in Computer Science. Springer- Verlag, Berlin, 1987.
13. A. Charnes and W. Cooper. Management Models and Industrial Applications of Linear Programming Vol. 1. John Wiley & Sons, New York, 1961.
14. A. Charnes, W. Cooper, and R.O. Ferguson. Optimal estimation of executive compensation by linear programming. Management Science, 1(2):138–151, 1955.
15. J.C. Cosset, Y. Siskos, and C. Zopounidis. Evaluating country risk: A decision support approach. Global Finance Journal, 3(1):79–95, 1992.
16. D.K. Despotis and D. Yannacopoulos. Méthode d’estimation d’utilités additives concaves en programmation linéare multiobjectifs. RAIRO Recherche Opérationelle, 24:331–349, 1990.
17. D.K. Despotis, D. Yannacopoulos, and C. Zopounidis. A review of the uta multicriteria method and some improvements. Foundations of Computing and Decision Sciences, 15(2):63–76, 1990.
18. D.K. Despotis and C. Zopounidis. Building additive utilities in the presence of nonmonotonic preference. In P.M. Pardalos, Y. Siskos, and C. Zopounidis, editors, Advances in Multicriteria Analysis, pages 101–114. Kluwer Academic Publisher, Dordrecht, 1993.
19. J.M. Devaud, G. Groussaud, and E. Jacquet-Lagrèze. UTADIS: Une méthode de construction de fonctions d’utilité additives rendant compte de jugements globaux. European Working Group on Multicriteria Decision Aid, Bochum, 1980.
20. D. Diakoulaki, C. Zopounidis, G. Mavrotas, and M. Doumpos. The use of a preference disaggregation method in energy analysis and policy making. Energy – The International Journal, 24(2):157–166, 1999.
21. L. Dias, V. Mousseau, J. Figueira, and J. Climaco. An aggregation/disaggregation approach to obtain robust conclusions with electre tri. European Journal of Operational Research, 138(2):332–348, 2002.
22. A.I. Dimitras, R. Slowinski, R. Susmaga, and C. Zopounidis. Business failure prediction using rough sets. European Journal of Operational Research, 114(2):263–280, 1999.
23. M. Doumpos and C. Zopounidis. Multicriteria Decision Aid Classification Methods. Kluwer Academic Publishers, Dordrecht, 2002.
24. M. Doumpos and C. Zopounidis. On the development of an outranking relation for ordinal classification problems: An experimental investigation of a new methodology. Optimization Methods and Software, 17(2):293–317, 2002.
25. P. Fishburn. A note on recent developments in additive utility theories for multiple factors situations. Operations Research, 14:1143–1148, 1966.
26. N. Freed and G. Glover. Simple but powerful goal programming models for discriminant problems. European Journal of Operational Research, 7:44–60, 1981.
27. A.M. Geoffrion, J.S. Dyer, and A. Feinberg. An interactive approach for multi-criterion optimization, with an application to the operation of an academic department. Management Science, 19(4):357–368, 1972.
28. M.C. González-Araya, L.A.D. Rangel, M.P.E. Lins, and L.F.A.M. Gomes. Building the additive utility functions for CAD-UFRJ evaluation staff criteria. Annals of Operations Research, 116(1–4):271–288, 2002.
29. M. Grabisch. The application of fuzzy integrals in multicriteria decision making. European Journal of Operational Research, 89(3):445–456, 1996.
30. E. Grigoroudis, J. Malandrakis, J. Politis, and Y. Siskos. Customer satisfaction measurement: An application to the Greek shipping sector. In D.K. Despotis and C. Zopounidis, editors, Integrating Technology & Human Decisions: Global Bridges into the 21st Century. Proceedings of the 5th Decision Sciences Institute International Conference, July 4-7 1999, Athens, Greece, volume 2, pages 1363–1365, 1999.
31. E. Grigoroudis, Y. Politis, and Y. Siskos. Satisfaction benchmarking and customer classification: An application to the branches of a banking organization. International Transactions in Operational Research, 9(5):599–618, 2002.
32. E. Grigoroudis and Y. Siskos. Preference disaggregation for measuring and analysing customer satisfaction: The MUSA method. European Journal of Operational Research, 143(1):148–170, 2002.
33. E. Grigoroudis and Y. Siskos. MUSA: A decision support system for evaluating and analysing customer satisfaction. In K. Margaritis and I. Pitas, editors, Proceedings of the 9th Panhellenic Conference in Informatics, Thessaloniki, Greece, pages 113–127, 2003.
34. E. Grigoroudis and Y. Siskos. A survey of customer satisfaction barometers: Results from the transportation-communications sector. European Journal of Operational Research, 152(2):334–353, 2003.
35. E. Grigoroudis, Y. Siskos, and O. Saurais. TELOS: A customer satisfaction evaluation software. Computers and Operations Research, 27(7–8):799–817, 2000.
36. I. Hatzinakos, D. Yannacopoulos, C. Faltsetas, and C. Ziourkas. Application of the MINORA decision support system to the evaluation of landslide favourability in Greece. European Journal of Operational Research, 50(1):60–75, 1991.
37. Ch. Hurson and C. Zopounidis. Gestion de Portefeuille et Analyse Multicritère. Economica, Paris, 1997.
38. E. Jacquet-Lagrèze. Interactive assessment of preferences using holistic judgments: The PREFCALC system. In C.A. Bana e Costa, editor, Readings in Multiple Criteria Decision Aid, pages 225–250. Springer-Verlag, Berlin, 1990.
39. E. Jacquet-Lagrèze. An application of the UTA discriminant model for the evaluation of R&D projects. In P.M. Pardalos, Y. Siskos, and C. Zopounidis, editors, Advances in Multicriteria Analysis, pages 203–211. Kluwer Academic Publishers, Dordrecht, 1995.
40. E. Jacquet-Lagrèze, R. Meziani, and R. Slowinski. MOLP with an interactive assessment of a piecewise linear utility function. European Journal of Operational Research, 31(3):350–357, 1987.
41. E. Jacquet-Lagrèze and M.F. Shakun. Decision support systems for semistructured buying decisions. European Journal of Operational Research, 16:48–56, 1984.
42. E. Jacquet-Lagrèze and J. Siskos. Une méthode de construction de fonctions d’ utilité additives explicatives d’ une prèfèrence globale. Technical Report Cahiers du LAMSADE 16, Université de Paris-Dauphine, Paris, 1978.
43. E. Jacquet-Lagrèze and Y. Siskos. Assessing a set of additive utility functions for multicriteria decision making: The UTA method. European Journal of Operational Research, 10(2): 151–164, 1982.
44. E. Jacquet-Lagrèze and Y. Siskos. Preference disaggregation: 20 years of MCDA experience. European Journal of Operational Research, 130(2):233–245, 2001.
45. M. Jarke, M.T. Jelassi, and M.F. Shakun. MEDIATOR: Toward a negotiation support system. European Journal of Operational Research, 31(3):314–334, 1987.
46. O.J. Karst. Linear curve fitting using least deviations. Journal of the American Statistical Association, 53:118–132, 1958.
47. R.L. Keeney. Siting Energy Facilities. Academic Press, New York, 1980.
48. R.L. Keeney and H. Raiffa. Decisions with Multiple Objectives: Preferences and Value Tradeoffs. John Wiley & Sons, New York, 1976.
49. J.E. Kelley. An application of linear programming to curve fitting. Journal of Industrial and Applied Mathematics, 6(1):15–22, 1958.
50. L.N. Kiss, J.M. Martel, and R. Nadeau. ELECCALC – An interactive software for modelling the decision maker’s preferences. Decision Support Systems, 12(4–5):311–326, 1994.
51. G. Klein, H. Moskowitz, S. Mahesh, and A. Ravindran. Assessment of multiattribute measurable value and utility functions via mathematical programming. Decision Sciences, 16(3):309–324, 1985.
52. M. Kostkowski and R. Slowinski. UTA+application (v. 1.20)–User’smanual. Technical Report Documents du LAMSADE 95, Université de Paris-Dauphine, Paris, 1996.
53. B. Malakooti and Y.Q. Zhou. Feedforward artificial neural networks for solving discrete multiple criteria decision making problems. Management Science, 40(11):1542–1561, 1994.
54. M. Manas and J. Nedoma. Finding all vertices of a convex polyhedron. Numerical Mathematics, 12:226–229, 1968.
55. N. Manouselis and N.F. Matsatsinis. Introducing a multi-agent, multi-criteria methodology for modeling electronic consumer’s behavior: The case of internet radio. In M. Klush and F. Zambonelli, editors, Cooperative Information Agents V, volume 2182 of Lecture Notes in Artificial Intelligence, pages 190–195. Springer-Verlag, Berlin, 2001.
56. J.L. Marichal and M. Roubens. Determination of weights of interactive criteria from a reference set. European Journal of Operational Research, 124(3):641–650, 2000.
57. N.F. Matsatsinis. New agricultural product development using data mining techniques and multicriteria methods. In A. Sideridis, editor, Proceedings of the 1st Hellenic Association of Information and Communication Technology in Agriculture, Food and Environment (HAICTA 2002), June 6-7 2002, Athens, Greece, 2002.
58. N.F. Matsatsinis and P. Delias. AgentAllocator: An agent-based multi-criteria decision support system for task allocation. In V. Marik, D. McFarlane, and P. Valckenaers, editors, Holonic and Multiagent Systems for Manufacturing, volume 2744 of Lecture Notes in Artificial Intelligence, pages 225–235. Springer-Verlag, Berlin, 2003.
59. N.F. Matsatsinis, P. Moraitis, V. Psomatakis, and N. Spanoudakis. Intelligent software agents for products penetration strategy selection. In F.G. Garijo and M. Boman, editors, Proceedings of the 9th European Workshop on Modelling Autonomous Agents in a Multi Agent World (MAAMAW99), June 30 - July 2 1999, Valencia, Spain, 1999.
60. N.F. Matsatsinis, P. Moraitis, V. Psomatakis, and N. Spanoudakis. Multi-agent architecture for agricultural products development. In G. Schiefer, R. Helbig, and U. Rickert, editors, Proceedings of the 2nd European Conference of the European Federation for Information Technology in Agriculture, Food and the Environment (EFITA 2000), September 27-30 2000, Bonn, Germany, pages 187–196, 2000.
61. N.F. Matsatsinis, P. Moraitis, V. Psomatakis, and N. Spanoudakis. An agent-based system for products penetration strategy selection. Applied Artificial Intelligence, 17(10):901–925, 2003.
62. N.F. Matsatsinis and A. Samaras. MCDA and preference disaggregation in group decision support systems. European Journal of Operational Research, 130(2):414–429, 2001.
63. N.F. Matsatsinis and Y. Siskos. MARKEX: An intelligent decision support system for product development decision. European Journal of Operational Research, 113(2):363–354, 1999.
64. N.F. Matsatsinis and Y. Siskos. DIMITRA: An intelligent decision support system for agricultural products development decisions. In F. Sevila, editor, Proceedings of the 3rd European Conference of the European Federation for Information Technology in Agriculture, Food and the Environment (EFITA 2001), June 18-20, Montpellier, France, 2001.
65. N.F. Matsatsinis and Y. Siskos. Intelligent Support Systems for Marketing Decision. Kluwer Academic Publishers, Dordrecht, 2003.
66. G. Mihelis, E. Grigoroudis, Y. Siskos, Y. Politis, and Y. Malandrakis. Customer satisfaction measurement in the private bank sector. European Journal of Operational Research, 130(2):347–360, 2001.
67. V. Mousseau, J. Figueira, and J.Ph. Naux. Using assignment examples to infer weights for ELECTRE-TRI method: Some experimental results. European Journal of Operational Research, 130(2):263–275, 2000.
68. V. Mousseau and R. Slowinski. Inferring an ELECTRE-TRI model from assignment examples. Journal of Global Optimization, 12(2): 157–174, 1998.
69. V. Mousseau, R. Slowinski, and P. Zielniewicz. A user-oriented implementation of the ELECTRE-TRI method integrating preference elicitation support. Computers and Operations Research, 27(7–8):757–777, 2000.
70. T. Murofushi and M. Sugeno. An interpretation of fuzzy measure and the Choquet integral as an integral withrespect to a fuzzy measure. Fuzzy Sets and Systems, 29(2):201–227, 1989.
71. M. Oral and O. Kettani. Modelling the process of multiattribute choice. Journal of the Operational Research Society, 40(3):281–291, 1989.
72. M. Oral, O. Kettani, J.C. Cosset, and M. Daouas. An estimation model for country risk rating. International Journal of Forecasting, 8(4):583–593, 1992.
73. Z. Pawlak. Rough sets. International Journal of Information and Computer Sciences, 11(5):341–356, 1982.
74. J.R. Quinlan. Induction of decision trees. Machine Learning, 1(1):81–106, 1986.
75. J.L. Richard. Aide à la décision stratégique en P.M.E. In E. Jacquet-Lagrèze and Y. Siskos, editors, Méthode de Décision Multicritère, pages 119–142. Hommes et Techniques, Paris, 1983.
76. B. Roy. Méthodologie Multicritère d’Aide à la Décision. Economica, Paris, 1985.
77. E. Sandalidou, E. Grigoroudis, and Y. Siskos. Organic and conventional olive oil consumers: A comparative analysis using customer satisfaction evaluation approach. In G. Baourakis, editor, Marketing Trends for Organic Food in the Advent of the 21st Century. World Scientific, 2003. to appear.
78. M.F. Shakun. Evolutionary Systems Design: Policymaking Under Complexity and Group Decision Support Systems. Holden-Day, San Francisco, CA, 1988.
79. M.F. Shakun. Airline buyout: Evolutionary systems design and problem restructuring in group decision and negotiation. Management Science, 37(10):1291–1303, 1991.
80. J. Siskos and D.K. Despotis. A DSS oriented method for multiobjective linear programming problems. Decision Support Systems, 5(1):47–55, 1989.
81. Y. Siskos. Comment modéliser les préférences au moyen de fonctions d’utilité additives. RAIRO Recherche Opérationelle, 14:53–82, 1980.
82. Y. Siskos. A way to deal with fuzzy preferences in multicriteria decision problems. European Journal of Operational Research, 10(3):314–324, 1982.
83. Y. Siskos. Analyse de systèmes de décision multicritère en univers aléatoire. Foundations of Control Engineering, 10(3–4): 193–212, 1983.
84. Y. Siskos. Analyses de regression et programmation lineaire. Revue de Statistique Appliquée, 23(2):41–55, 1985.
85. Y. Siskos. Evaluating a system of furniture retail outlets using an interactive ordinal regression method. European Journal of Operational Research, 23:179–193, 1986.
86. Y. Siskos. MUSTARD: Multicriteria utility-based stochastic aid for ranking decisions. Journal of Behavioral Decision Making, 15(5):461–465, 2002.
87. Y. Siskos and N. Assimakopoulos. Multicriteria highway planning: A case study. Mathematical and Computer Modelling, 12(10–11):1401–1410, 1989.
88. Y. Siskos and E. Grigoroudis. Measuring customer satisfaction for various services using multicriteria analysis. In D. Bouyssou, E. Jacquet-Lagrèze, P. Perny, R. Sllowinski, D. Vanderpooten, and P. Vincke, editors, Aiding Decisions with Multiple Criteria: Essays in Honor of Bernard Roy, pages 457–482. Kluwer Academic Publishers, Dordrecht, 2002.
89. Y. Siskos, E. Grigoroudis, N.F. Matsatsinis, and G. Baourakis. Preference disaggregation analysis in agricultural product consumer behaviour. In P.M. Pardalos, Y. Siskos, and C. Zopounidis, editors, Advances in Multicriteria Analysis, pages 185–202. Kluwer Academic Publishers, Dordrecht, 1995.
90. Y. Siskos, E. Grigoroudis, N.F. Matsatsinis, G. Baourakis, and F. Neguez. Comparative behavioural analysis of european olive oil consumer. In J. Janssen, C.H. Skiadas, and C. Zopounidis, editors, Advances in Stochastic Modelling and Data Analysis, pages 293–310. Kluwer Academic Publishers, Dordrecht, 1995.
91. Y. Siskos, E. Grigoroudis, Y. Politis, and Y. Malandrakis. Customer satisfaction evaluation: Some real experiences. In A. Colorni, M. Paruccini, and B. Roy, editors, A-MCD-A: Multiple Criteria Decision Aiding, pages 297–314. European Commission Joint Research Centre, Ispra, Italy, 2001.
92. Y. Siskos, E. Grigoroudis, C. Zopounidis, and O. Saurais. Measuring customer satisfaction using a collective preference disaggregation model. Journal of Global Optimization, 12(2): 175–795, 1998.
93. Y. Siskos and N.F. Matsatsinis. A DSS for market analysis and new product design. Journal of Decision Systems, 2(1):35–60, 1993.
94. Y. Siskos, N.F. Matsatsinis, and G. Baourakis. Multicriteria analysis in agricultural marketing: The case of French olive oil market. European Journal of Operational Research, 130(2):315–331, 2001.
95. Y. Siskos, A. Spiridakos, and D. Yannacopoulos. Using artificial intelligence and visual techniques into preference disaggregation analysis: The MIIDAS system. European Journal of Operational Research, 113(2):236–246, 1999.
96. Y. Siskos and A. Spyridakos. Intelligent multicriteria decision support: Overview and perspectives. European Journal of Operational Research, 113(2):236–246, 1999.
97. Y. Siskos, A. Spyridakos, and D. Yannacopoulos. MINORA: A multicriteria decision aiding system for discrete alternatives. Journal of Information Science and Technology, 2(2): 136–149, 1993.
98. Y. Siskos and D. Yannacopoulos. UTASTAR: An ordinal regression method for building additive value functions. Investigação Operacional, 5(1):39–53, 1985.
99. Y. Siskos and C. Zopounidis. The evaluation criteria of the venture capital investment activity: An interactive assessment. European Journal of Operational Research, 31(3):304–313, 1987.
100. Y. Siskos, C. Zopounidis, and A. Pouliezos. An integrated DSS for financing firms by an industrial development bank in Greece. Decision Support Systems, 112(2):151–168, 1994.
101. R. Slowinski. Rough set approach to decision analysis. AI Expert Magazine, 10(3): 18–25, 1995.
102. P. Spiliopoulos. Analyse et Simulation du Marché pour le Lancement d’un Nouveau Produit Réalisation d’un SIAD. PhD thesis, Université de Paris-Dauphine, Paris, 1987. Thèse de 3e cycle.
103. A. Spyridakos, Y. Siskos, D. Yannakopoulos, and A. Skouris. Multicriteria job evaluation for large organisations. European Journal of Operational Research, 130(2):375–387, 2000.
104. V. Srinivasan and A.D. Shocker. Linear programming techniques for multidimensional analysis of preferences. Psychometrika, 38(3):337–396, 1973.
105. A. Stam, M. Sun, and M. Haines. Artificial neural network representations for hierarchical preference structures. Computers and Operations Research, 23(12):1191–1201, 1996.
106. T.J. Stewart. Pruning of decision alternatives in multiple criteria decision making, based on the UTA method for estimating utilities. European Journal of Operational Research, 28(1):79–88, 1987.
107. C. Van de Panne. Methods for Linear and Quadratic Programming. North-Holland Publishing Company, Amsterdam, 1975.
108. H.M. Wagner. Linear programming techniques for regression analysis. Journal of the American Statistical Association, 54:206–212, 1959.
109. F.W. Young, J. De Leeuw, and Y. Takane. Regression with qualitative and quantitative variables: An alternating least squares method with optimal scaling features. Phychometrika, 41(4):505–529, 1976.
110. K. Zaras. Rough approximation of a preference relation by a multi-attribute stochastic dominance for deterministic and stochastic evaluation problems. European Journal of Operational Research, 130(2):305–314, 2000.
111. S. Zionts and J. Wallenius. An interactive programming method for solving the multiple criteria problem. Management Science, 22(6):652–663, 1976.
112. C. Zopounidis. A multicriteria decision-making methodology for the evaluation of the risk of failure and an application. Foundations of Control Engineering, 12(1):45–67, 1987.
113. C. Zopounidis and M. Doumpos. A multicriteria decision aid methodology for the assessment of country risk. European Research on Management and Business Economics, 3(3): 13–33, 1997.
114. C. Zopounidis and M. Doumpos. Developing a multicriteria decision support system for financial classification problems: The FINCLAS system. Optimization Methods and Software, 8((3-4)):277–304, 1998.
115. C. Zopounidis and M. Doumpos. Business failure prediction using UTADIS multicriteria analysis. Journal of the Operational Research Society, 50(11): 1138–1148, 1999.
116. C. Zopounidis and M. Doumpos. Building additive utilities for multi–group hierarchical discrimination: The MHDIS method. Optimization Methods and Software, 14(3):219–240, 2000.
117. C. Zopounidis and M. Doumpos. INVESTOR: A decision support system based on multiple criteria for portfolio selection and composition. In A. Colorni, M. Paruccini, and B. Roy, editors, A-MCD-A: Multiple Criteria Decision Aiding, pages 371–381. European Commission Joint Research Centre, Ispra, Italy, 2000.
118. C. Zopounidis and M. Doumpos. PREFDIS: A multicriteria decision support system for sorting decision problems. Computers and Operations Research, 27((7–8)):779–797, 2000.
119. C. Zopounidis and M. Doumpos. A preference disaggregation decision support system for financial classification problems. European Journal of Operation Research, 130(2):402–413, 2001.
120. C. Zopounidis, M. Doumpos, and S.H. Zanakis. Stock evaluation using a preference disaggregation methodology. Decision Sciences, 30(2):313–336, 1999.
121. C. Zopounidis, Ch. Hurson, and M. Doumpos. Risque-Pays: Evaluation des Aspects Economiques, Sociaux et Politiques. Economica, Paris, 2000.
122. C. Zopounidis, N.F. Matsatsinis, and M. Doumpos. Developing a multicriteria knowledge-based decision support system for the assessment of corporate performance and viability: The FINEVA system. Fuzzy Economic Review, 1(2):35–53, 1996.