For more than 15 years, the Institute for environmental engineering of the Swiss Federal Institute of Technology in Lausanne (EPFL) has been active in the MCDA field under the leadership of Professor Lucien Yves Maystre. “Concrete application of the MCDA methodology to environmental issues, with a group, in Switzerland and in Africa” has been the leitmotiv all along. When Prof. Maystre retired last year, the authors - two of his former collaborators - took over the activity in the MCDA field on a private basis, under his patronage.

During the EPFL era, research activities and real-world contracts have been tightly connected. For example, in the mid-80', Jean Simos’ thesis - which became a best-seller book - was based on a contract Prof. Maystre and a group of collaborators undertook for the County of Geneva about waste management. More recently, three contracts granted by the Federal Office of the Environment, Forest and Landscape (FOEFL) and various Swiss counties to Prof. Maystre and D. Bollinger gave a strong factual basis to their book that was published at the end of 1998.

For this reason, the switch from a public to a private-run activity was not as difficult as it could have been expected! Up to now, the major clients of the company have also been federal and county administrations. Even the everyday business at the Bureau d’aide à la décision can lead to interesting questions: for instance, in a recent case, we dealt with a group of experts who had to agree on a common set of weights, for legal reasons. We found a solution (based on SRF, see below), which satisfied the group, but what about its theoretical foundation?

This connection with real-world problems influenced all the research at the EPFL, even for the research that was not linked to a contract. For instance, the thesis of Ousseynou Diop was an attempt to realise a parallel study in Dakar (Senegal) of Jean Simos’ thesis (possibility of “transplantation” of MCDA in a different culture). More recently, J. Pictet’s thesis - also published as a book - has been devoted to the definition of a MCDA framework for various environmental evaluation methods. Amadou H. Maiga’s doctorate used MCDA to compare small cities water supply systems in different African countries.

The research reaped the benefits of the results on specific topics obtained by numerous undergraduate and postgraduate students at the EPFL.

All this research led to two major streams of results, which are connected:

The first stream has been investigating the possible use, jointly with the MCDA approach, of different concepts of the social sciences, such as negotiation, search of a consensus, legitimisation, etc. This led to the development of a kind of “social engineering” which has been tested all along in practice. More recently, J. Pictet proposed, with Val Belton, a general framework to analyse the way of applying the MCDA methodology with a group, which is independent of a specific aggregation method. The second stream gave birth to different tools, among which we can highlight:

These concepts and tools are now the foundation of our activity at the Bureau d’aide à la décision.

Concerning the aggregation methods, a choice had been made up front to choose one method and to stick to it: the ELECTRE one, which is in fact, a family of methods. The choice has been strictly respected until recently. The knowledge of these methods led to a book in which all these methods are explained to non-mathematicians, along with practical tips and a short presentation of concrete projects.

On top of the books already mentioned, two others have to be added:

The EPFL era is now over. Will the new millennium see the emergence of a new type of MCDA research: the private-driven one?

Belton V., Pictet J., 1997, “A framework for group decision using a MCDA model. Sharing, aggregating or comparing individual information?”, Journal of decision systems 6 (3), p. 283-303.

Diop O., 1988, Contribution à l’étude de la gestion des déchets solides de Dakar: Analyse systématique et aide à la décision, Thèse de doctorat, EPFL, Lausanne.

Guène O., Touré C. S., Maystre L. Y., 1998, Promotion de l’hygiène du milieu. Une stratégie participative, Presses polytechniques et universitaires romandes, Lausanne.

Maiga A. H., 1996, Evaluation des aspects institutionnels, techniques, d’exploitation et de gestion des systèmes d’approvisionnement en eau potable des petits centres urbains d’Afrique francophone, Thèse de doctorat, EPFL, Lausanne.

Maystre L. Y., 1985-1997, Initiation aux calculs économiques pour les ingénieurs, illustrée à partir d’exemples du génie de l’environnement, Presses polytechniques et universitaires romandes, Lausanne.

Maystre L. Y., Bollinger D., 1998, Aide à la négociation multicritère, Presses polytechniques et universitaires romandes, Lausanne.

Maystre L. Y., Ghinet S., Pictet J., Simos J., 1994, “Areas of priority for environmental measures, illustrated by the case of the canton of Geneva, Switzerland”, Presentation at EURO XIII/OR 36, Glasgow, July 19-22.

Maystre L.Y., Pictet J., Simos J., 1994, Méthodes multicritères ELECTRE. Description, conseils pratiques et cas d’application à la gestion environnementale, Presses polytechniques et universitaires romandes, Lausanne.

Pictet J., 1996, Dépasser l’évaluation environnementale, Presses polytechniques et universitaires romandes, Lausanne.

Pictet J., 1999, “Légitimation du processus de décision auprès des acteurs internes et externes au processus de décision”, Conférence invitée, Colloque “La gestion de projets au service de l’environnement”, Lévis, 7 mai.

Pictet J., Maystre L. Y., Simos J., 1994, “SURMESURE. An instrument for presentation of results obtained by methods of the ELECTRE and PROMETHEE families”, in M. Paruccini (Ed.), Applying multiple criteria aid for decision to environmental management, Kluwer, Dordrecht, p. 291-304.

Pictet J., Simos J., 1996, “Pesée globale des intérêts. Apports de l’aide multicritère à la décision”, in Ch.-A. Morand (Ed.), La pesée des intérêts. Droit de l’environnement et de l’aménagement du territoire, Helbing & Lichtenhahn, Bâle / Faculté de droit de Genève. p. 173-188

Rogers M. G., Bruen M., Maystre L. Y., 1999, ELECTRE and Decision support: Methods and applications in engineering and infrastructure investment (tentative subtitle), Kluwer, Dordrecht, forthcoming.

Simos J., 1989, “Modes d’évaluation des études d’impact sur l’environnement”, Verband Schweizerischer Abwasserfachleute, Vebandsbericht Nr 400.

Simos J., 1990, Evaluer l’impact sur l’environnement, Presses polytechniques et universitaires romandes, Lausanne.