Personal Data

Full name

Marta Guerreiro Duarte Mesquita de Oliveira

Publishing name

Marta Mesquita

Birthday

1961-01-15T00:00:00

Academic Degrees

DOUTORAMENTO(0)

Degree date

1999

Final grade

Distinção e Louvor

Degree granting institution

Universidade de Lisboa

School / College / Campus

Faculdade de Ciências

Thesis title

Supervisor

Co-supervisor

Scientific area

MESTRADO(0)

Degree date

1989

Final grade

Muito Bom

Degree granting institution

Universidade de Lisboa

School / College / Campus

Faculdade de Ciências

Thesis title

Supervisor

Co-supervisor

Scientific area

LICENCIATURA(0)

Degree date

1985

Final grade

Bom

Degree granting institution

Universidade de Lisboa

School / College / Campus

Faculdade de Ciências

Thesis title

Supervisor

Co-supervisor

Scientific area

Profissional activity

Period Position Institution
From 1986 to 1989 Junior Teaching Assistant Instituto Superior de Agronomia
From 1989 to 1999 Teaching Assistant Instituto Superior de Agronomia
From 1999 Assistant Professor Instituto Superior de Agronomia

Area of scientific activity

Area of scientific activity

Operational Research; Combinatorial Optimisation; Mixed Integer Linear Programming;

Specialization domain

Operational Research, Combinatorial Optimisation.

Current main scientific area

Research activities focused on mixed integer linear programming models and solution approaches for:
Transportation Problems; Vehicle and crew scheduling;Rostering; Vehicle Routing; Blending.

In particular, solution techniques for optimization problems arising in
-Food Engineering;
-Environmental Engineering (optimization of biogas production through anaerobic co-digestion);
-Forest management (machine location and road building problem in forest harvesting);
-Fishery Surveys;
-Public transit companies.

Other scientific activities

Coordinator of the Pos-Graduation Courses:
- Análise de dados Geográficos com R – Instituto de Financiamento da Agricultura e Pescas-IFAP I.P., Instituto Superior Agronomia, 2015.
- Introdução à Análise Estatística e aos SIG com R - Instituto Superior Agronomia 2014
- Introdução à Análise Estatística com R - Instituto Superior Agronomia 2008, 2009, 2012, 2013.

Experience as scientific advisor

Master Thesis (co)Superviser:
- "Valorização energética de insolúveis de cereais e café através da co-digestão anaeróbia com chorume de porco", Student - Sílvia da Silva Sousa, Master Degree in Environmental Engineering, University of Lisbon, Instituto Superior de Agronomia, December 2016.
-"Meta-heurísticas para o problema do caixeiro viajante com seleção de hotéis". Student – Raquel Maria Pinheiro Teixeira, Master degree in Statistics and Operational Research, University of Lisbon, Faculdade de Ciências, July 2016.
-"Ice cream and nutrition: modeling optimal ice cream formulations", Master student- Inês Marques Lopes, Master Degree in Food Engineering, University of Lisbon, Instituto Superior de Agronomia, March 2014.
- "Mapas Cognitivos baseados em Regras Difusas: Modelação do
Comportamento dos Pescadores da Frota de Cerco Portuguesa". Master student- Laura Beatriz Torres Simões Wise, Master in Mathematics Applied to Bological Sciences, Technical University of Lisbon, Instituto Superior de Agronomia, May 2008.

Final project in Biology Superviser:
-"Automatização da interacção entre um programa de busca de motivos e um programa de homologia. ProBlast". Undergradute Student - Miguel Ramos, Technical University of Lisbon, Instituto Superior de Agronomia, June 2009.


Member of the program (scientific) committee:
- ICORES 2018 - 7th International Conference on Operations Research and Enterprise Systems, Madeira, Portugal, 2018.
- ICORES 2017 - 6th International Conference on Operations Research and Enterprise Systems, Porto, Portugal, 2017.
- ICCL’17 – 8th International Conference on Computational Logistics, Southampton, 2017.
- ICCL’16 – 7th International Conference on Computational Logistics, organized by CMAF-CIO, Lisbon, Portugal, 2016.
- ICORES 2016 - 5th International Conference on Operations Research and Enterprise Systems, Rome, Italy, 2016.
- ICORES 2015, 4th International Conference on Operations Research and Enterprise Systems, Lisbon, Portugal, 2015.
- ICORES 2014, 3rd International Conference on Operations Research and Enterprise Systems, Angers, France, 2014.
- ICORES 2013, 2nd International Conference on Operations Research and Enterprise Systems, Barcelona, Spain, 2013.


Member of the organizing committee:
- "Winter School on Optimization in Logistics and Transportation 2012", jointly organized by the CIRRELT, University of Montreal, and the Operations Research Center (CIO), Estoril, Portugal, January, 2012.
- "Winter School on Network Optimization, 2011", is one of the major activities of the European Network Optimization Group, Estoril, Portugal, January, 2011.
- "OR Running on Public Transport", a Euro 2010 satellite workshop, Lisbon, Portugal, 2010

Member of the Executive Board of Operations Research Center (CIO) classified as a Center of Excellence in the last FCT evaluation, 2007-2015.


Participations in R&D projects

- TDC/MAT-NAN/2196/2014, Modeling Routing and Rostering with Network Flows, RORNET, from 01/05/2016 to 30/04/2019, Financial support FCT.

- H2020-ISIB-04b-2015: Research and Inovation Action (RIA), “ALTERFOR - Alternative models and robust decision-making for future forest management“, Coordinated by: Sveriges Lantbruksuniversitet, Duration: 54 months.

-PPCDT/MAT/57893/2004 from 01-01-2007 to 15-11-2008, "Vehicle and Crew Scheduling Optimisation. Mathematical Models and Solution Approaches”, Principal Investigator (IR).

-POCTI/MAT/57893/2004 from 02-01-2005 to 30-10-2007 "Vehicle and Crew Scheduling Optimisation. Mathematical Models and Solution Approaches”, Principal Investigator (IR).

-POCTI-ISFL-1-152-2003,"A Center of Excellence on Operational Research"(member of team);

-POCTI/MAT/139/94/2001,"Modelos de Optimização Combinatória: Abordagens Algorítmicas para Novos Modelos e Problemas de Grande Dimensão"(member of team);


Awards

Year Award Awarding entity

Publications

Publicações em actas de encontros científicos

  • -“A Multiplier Adjustment Method for the Multi-Depot Vehicle Scheduling Problem" - com J.Paixão. Preprints TRISTAN II, TRIennal Symposium on Transportation ANalysis, Vol II pg. 749-762, Capri, Italy , 1994.

Outras publicações

  • -"A Branch-and-Cut Algorithm for the Multi-Depot Vehicle Scheduling Problem", Marta Mesquita and José Paixão, CIO-Centro de Investigação Operacional, Working Paper nº 7 / 2003.

Publicações em actas de encontros científicos

  • -"Exact Solutions for the Vehicle and Crew Scheduling Problem", Mesquita, M., A. Paias, A. Respício, In Proceedings of INOC 2005 - International Network Optimization Conference, L. Gouveia and C. Mourão (eds.), Lisbon, ISSN: 1762-5734, pp B2.300-B2.306, March 2005.

Publicações em actas de encontros científicos

  • -"Branch-and-price for integrated multi-depot vehicle and crew scheduling problem", Mesquita, M., A. Paias, A. Respício, In Advanced OR and AI Methods in Transportation, Proceedings of 10th EWGT Meeting and 16th Mini-Euro Conference, A. Jaszkiewicz, M. Kaczmarek, J. Zak, M. Kubiak (Eds), Poznan, Poland, ISBN 83-7143-239-5, pp 553-558, 2005.

Artigos em revistas de circulação internacional com arbitragem científica

  • -"Set partitioning/covering-based approaches for the integrated vehicle and crew scheduling problem", Mesquita, Marta, Ana Paias, Computers & Operations Research, Vol. 35, Issue 5, pp 1562-1575, May 2008.

Outras publicações

  • -"Solving Public Transit Scheduling Problems", Mesquita, Marta, Margarida Moz, Ana Paias , José Paixão, Margarida Pato, Ana Respício, CIO-Centro de Investigação Operacional, Working Paper nº 1 / 2008 (available online http://cio.fc.ul.pt/home.do).

Publicações em actas de encontros científicos

  • - “Issues on Dynamic Cognitive Map Modelling of Purse-seine Fishing Skippers Behavior, Carvalho JP. , Wise L., Murta A., Mesquita M., IEEE Source: 2008 IEEE INTERNATIONAL CONFERENCE ON FUZZY SYSTEMS, VOLS 1-5 Book Series: IEEE International Conference on Fuzzy Systems, pg. 1505-1512, 2008 (Digital Object Identifier 10.1109/FUZZY.2008.4630571).

Artigos em revistas de circulação internacional com arbitragem científica

  • -"Branching approaches for the integrated vehicle and crew scheduling", Mesquita, Marta, Ana Paias , Ana Respício, Public Transport. Volume 1, Issue 1, pp 21-37, Springer Berlin/ Heidelberg, 2009 (http://dx.doi.org/10.1007/s12469-008-0005-2).

Artigos em revistas de circulação internacional com arbitragem científica

  • -"A new model for the integrated vehicle-crew-rostering problem and a computational study on rosters", Mesquita, Marta, Margarida Moz, Ana Paias, José Paixão, Margarida Pato, Ana Respício, Journal of Scheduling, Springer, Journal of Scheduling, Springer, vol. 14, number 4, pp. 319-334, 2011, (DOI: 10.1007/s10951-010-0195-8).

Capítulos de livros

  • -"Multiple Depot Vehicle Scheduling Problem: A new heuristic based on Quasi-Assignment Algorithms", co-author J.Paixão, In: M. Desrochers e J. M. Rousseau (eds), Computer-Aided Transit Scheduling, LECTURES NOTES IN ECONOMICS AND MATHEMATICAL SYSTEMS - 386, Springer-Verlag. Berlin, Heidelberg, pg. 167-180, 1992.

Capítulos de livros

  • -"Exact Algorithms for the Multi-Depot Vehicle Scheduling Problem based on Multicommodity Network Flow Type Formulations ", co-author J.Paixão. In: Wilson, Nigel H. M. (ed.), Computer-Aided Transit Scheduling, LECTURES NOTES IN ECONOMICS AND MATHEMATICAL SYSTEMS - 471, Springer-Verlag. Berlin, Heidelberg, pg. 221-243, 1999.

Teses

  • - "Escalonamento de Viaturas com Multi-Depósitos: Modelos Matemáticos de Quasi-Afectação" - Master Thesis, DEIO - Faculdade de Ciências, Universidade de Lisboa, 1989.

Teses

  • -"Algoritmos para Problemas da Escalonamento de Viaturas com Multi-Depósitos" - PhD Thesis, DEIO - Faculdade de Ciências, Universidade de Lisboa, 1999.

Artigos em revistas de circulação internacional com arbitragem científica

  • - “Qualitative modelling of fishermen’s behaviour in a pelagic fishery”, Laura Wise, Alberto G. Murta, Joao P. Carvalho, Marta Mesquita, Ecological Modelling, Elsevier, 228, pg 112– 122, 2012. (http://dx.doi.org/10.1016/j.ecolmodel.2011.12.008)

Publicações em actas de encontros científicos

  • - “An integrated vehicle-crew-roster problem with days-off pattern", Marta Mesquita, Margarida Moz, Ana Paias e Margarida Vaz Pato, Selected Papers of the Annual International Conference of the German Operations Research Society, Operations Research Proceedings 2010, Munich, German, September 2010, Bo Hu, Karl Morasch, Stefan Pickl e Markus Siegle (eds.), Springer, Berlin, pp. 245-250, 2011 (DOI: 10.1007/978-3-642-20009-0_39)

Publicações em actas de encontros científicos

  • - "Comparing Roster Patterns within a Single Depot Vehicle-Crew-Roster Problem", Marta Mesquita, Margarida Moz, Ana Paias e Margarida Vaz Pato, Proceedings of the VII ALIO/EURO - Workshop on Applied Combinatorial Optimization, Porto, pp. 218-221, 2011 (http://www.dcc.fc.up.pt/ALIO-EURO-2011/)

Publicações em actas de encontros científicos

  • - "Planning bus driver rosters", M. Mesquita, M. Moz, A. Paias and M. Pato, Proceedings of the 1st International Conference on Operations Research and Enterprise Systems (ICORES), organized by Institute for Systems and Technologies of Information, Control and Communication (INSTICC), Vilamoura, pp. 415-420, 2012 (http://www.scitepress.org/DigitalLibrary)

Capítulos de livros

  • “TSP with Multiple Time-Windows and Selective Cities”, Marta Mesquita, Alberto Murta, Ana Paias, and Laura Wise, in D. Pacino, S. Voss and R.M. Jensen (eds): Lecture Notes in Computer Sciences, Vol. 8197, pp 158-172, Springer-Verlag Berlin Heidelberg 2013.

Artigos em revistas de circulação internacional com arbitragem científica

  • "A decomposition approach for integrated vehicle-crew-roster problem with days-off pattern", M. Mesquita, M. Moz, A Paias, M. Pato, European Journal of Operational Research, Volume 229, Issue 2, Pages 318–331, 1 September 2013.

Artigos em revistas de circulação internacional com arbitragem científica

  • - “A decompose-and-fix heuristic based on multi-commodity flow models for driver rostering with days-off pattern”, M. Mesquita, M. Moz, A Paias, M. Pato, European Journal of Operational Research, Volume 245, Issue 2, 1 September 2015, Pages 423–437.

Artigos em revistas nacionais com arbitragem científica

  • - “Escalonamento de viaturas e tripulações”, Ana Paias e Marta Mesquita, in Boletim da APDIO, 52, 2015.

Artigos em revistas de circulação internacional com arbitragem científica

  • - “A metaheuristic approach to fisheries survey route planning”, Marta Mesquita1, Alberto G. Murta, Ana Paias and Laura Wise, Volume 24, Issue 3, May 2017, Pages 439–464.

Artigos em revistas de circulação internacional com arbitragem científica

  • Lopes I, Martins I, Mesquita M, Valença de Sousa V, Ferreira-Dias S. Designing healthy ice creams with linear programming: An application using traditional Portuguese products. J Food Process Eng. 2017;e12601. https://doi.org/10.1111/jfpe.12601

Communications

Comunicações orais por convite

- “Optimizing Ship Routes”, Marta Mesquita, Alberto Murta, Ana Paias, Laura Wise, 11th Brainstorming on Advanced Mathematical Tools for Optimization, September 12, 2014, IST, TagusPark, Lisbon, Portugal.

Comunicações orais por convite

- “Comparing two MILP formulations for driver rostering”, M. Mesquita, M. Moz, A. Paias, M. Pato, EURO|INFORMS 26TH European Conference on Operational Research, Rome July 1 – 4, 2013.

- “Optimizing routes for a research vessel”, Marta Mesquita, Alberto Murta, Ana Paias, Laura Wise, VeRoLog 2012 - First Conference of the EURO Working Group on Vehicle Routing and Logistics Optimization. Bologna, Italy 18 - 20 June 2012.

- “Influence of Typical Days-off Patterns on the Solutions of an Integrated Vehicle-crew-roster Problem”, Margarida Pato, Marta Mesquita, Margarida Moz, Ana Paias, Invited session, Conference for the International Federation of Operational Societies, IFORS, Melbourne, Australia, 2011.

- “Comparing Roster Patterns within a Single Depot Vehicle-Crew-Roster Problem” Marta Mesquita_, Margarida Mozy, Ana Paias, Margarida Pato, Invited cluster on Timetabling and Rostering, VII ALIO/EURO Workshop on Applied Combinatorial Optimization, Porto, 2011.

- “The integrated vehicle-crew-roster with days-off pattern”, M. Mesquita, M. Moz, A. Paias, M. Pato, 24th European Conference on Operational Research - EURO XXIII, Lisbon, 2010.

- “A decomposition approach to the integrated vehicle-crew-rostering problem”, A. Paias, M. Mesquita, M. Moz, M. Pato, 23nd European Conference on Operational Research - EURO XXIII, Bonn, 2009.

- “A decomposition approach to the integrated vehicle-crew-rostering problem”, A. Paias, M. Mesquita, M. Moz, M. Pato, 23nd European Conference on Operational Research - EURO XXIII, Bonn, 2009.

-"Solving Public Transport Scheduling Problems", Mesquita, M, M. Moz, A. Paias, J. Paixão, M.V. Pato, A. Respício, 22nd European Conference on Operational Research - EURO XXII, University of Economics, Prague, 2007.

- "Branching approaches for the integrated multi-depot vehicle and crew scheduling problem", Marta Mesquita, Ana Paias and Ana Respício, EURO XXI, 21st European Conference on Operational Research, Reykjavik, Iceland, July 2006.

- "Vehicle Scheduling Problems: A Lagrangean Relaxation for the Multi-Depot and the Single-Depot with Different Types of Vehicles", A. Costa, I. Branco and M. Mesquita, XIII World Conference on Operations Research, IFORS 93, Lisbon, July 1993.

- "An Exact Algorithm for the Multiple Depot Vehicle Scheduling Problem",M. Mesquita, J. Paixão, XIII World Conference on Operations Research, IFORS 93, Lisbon, July 1993.

Outras comunicações orais

- "An integrated framework for bus driver rostering and re-rostering", M. Mesquita, M. Moz, A. Paias, M. Pato, Annual Workshop of the EURO Working Group on Vehicle Routing and Logistics optimization (VeRoLog), Amsterdam, Netherlands 2017.

- “A hybrid metaheuristic to plan vessel routes in fishery surveys”, Marta Mesquita, Ana Paias, ICCL’16, 7th International Conference on Computational Logistics, Lisbon, Portugal 2016.

- “A Benders based heuristic for a m-TSP with multiple time windows and selective cities”, Marta Mesquita, Ana Paias, Verolog - Fifth meeting of the EURO Working Group on Vehicle Routing and Logistics Optimization, Nantes, França 2016.

- “A decompose-and-fix heuristic for driver rostering”, Marta Mesquita, Margarida Moz, Ana Paias, Margarida Pato, "Verolog 2015 - Fourth meeting of the EURO Working Group on Vehicle Routing and Logistics Optimization", University of Vienna, Faculty of Business, Economics and Statistics, 08-10 Junho 2015.

-"MIP-based heuristics for driver rostering", M. Mesquita, M. Moz, A. Paias, M. Pato, 3rd International Symposium on Combinatorial Optimization - ISCO, Lisbon, Portugal, 2014.

- “Modelos matemáticos para planeamento de escalas de motoristas”, Marta Mesquita, Margarida Moz, Ana Paias, Margarida Vaz Pato, XVI Congresso Associação Portuguesa de Investigação Operacional, Bragança 3 a 5 Junho 2013.

- “Modelling and solving driver rostering problems”, M. Mesquita, M. Moz, A. Paias, M. Pato, 16th Euro Working Group on Transportation, Porto 4 – 6 September 4 – 6, 2013.

- “Comparison of Two Driver Rostering Models”, M. Moz, M. Mesquita, A. Paias, M. Pato, ICCL, 4th International Conference on Computational Logistics, Denmark, 2013.

-“ TSP with Multiple Time-Windows and Selective Cities”, A. Paias, M. Mesquita, M. Moz, M. Pato, ICCL, 4th International Conference on Computational Logistics, Denmark, 2013.

- “Planning Bus Driver Rosters”, Marta Mesquita_, Margarida Mozy, Ana Paias, Margarida Pato, ICORS 2012 – 1st International Conference on Operations Research and Enterprise Systems, Vilamoura, Algarve, 4-6 Fevereiro 2012.

- “Optimizing routes for a research vessel”, Marta Mesquita, Alberto Murta, Ana Paias, Laura Wise, COA 2012 – The paths of combinatorial optimization applications in Portugal, Sabrosa, Portugal, September 5 – 7, 2012.

- “Solving the Integrated Vehicle-Crew Rostering Problem”, M. Mesquita, M. Moz, A. Paias, M. Pato, COA 2012 – The paths of combinatorial optimization applications in Portugal, Sabrosa, Portugal, September 5 – 7, 2012.

- “Planeamento integrado de veículos, tripulações e escalas de motoristas com padrão cíclico de folgas”, Margarida Moz, Marta Mesquita, Ana Paias, Margarida Pato, IO 2011, 15º Congresso da Associação Portuguesa de Investigação Operacional, APDIO , Coimbra, 2011.

- “The Integrated Vehicle-Crew-Roster Problem with Different Days-Off Policies”, Ana Paias, Marta Mesquita, Margarida Moz,, Margarida Vaz Pato, Portugal, Optimization 2011.

- “Planning sheep routes to study the abundance of fish species”, Marta Mesquita, Alberto Murta, Ana Paias, Laura Wise, Portugal, Optimization 2011.

- "Uma abordagem de decomposição para o problema integrado de escalonamento de veículos, tripulações e planeamento de escalas", M. Pato, M. Mesquita, M. Moz, A. Paias, IO2009 - 14º Congresso da APDIO , Universidade Nova de Lisboa, Lisboa 2009.

- "A decomposition approach to the integrated vehicle-crew-rostering problem", M. Mesquita, M. Moz, A. Paias, M. Pato, AIRO 2008 - XXXIX Annual Conference of Italian Operational Research Society, Ischia – Italy, 2008.

-"Um algoritmo para o problema integrado de escalonamento de viaturas, tripulações e planeamento de escalas", M. Mesquita, M. Moz, A. Paias, J. Paixão, M. Pato, A. Respício, IO2008 - 13º Congresso da APDIO, Universidade de Trás-os-Montes e Alto Douro (UTAD), Vila Real, 2008.

- "Escalonamento integrado de viaturas e tripulações: uma aplicação", co-author Ana Paias, IO 2006 - 12º Congresso da APDIO, Instituto Superior de Economia e Gestão, Universidade Técnica de Lisboa, October 2006

- "Exact Solutions for the Vehicle and Crew Scheduling Problem", co-authors Ana Paias and Ana Respício, INOC 2005, International Network Optimization Conference, FCUL, Portugal, March 2005

- "Branch-and-Price for integrated multi-depot vehicle and crew scheduling problem", co-authors Ana Paias and Ana Respício, 10th EWGT Meeting, Poznan, Poland, September 2005.

- "Solving Vehicle and Crew Scheduling Simultaneously", co-author Ana Paias, IO 2004-11º Congresso da APDIO, Faculdade de Engenharia da Universidade do Porto, Portugal, 4-7 April 2004.

- "Set Covering/Partitioning Models for Vehicle and Crew Scheduling Problems", co-author Ana Paias, Optimization 2004, Lisboa, Portugal, July 2004

- "Valid Inequalities and Separation Procedures for Multi-Depot Vehicle Problem", co-author J. Paixão,5th EURO / INFORMS Joint International Meeting, Istambul, Turquia, July 2003.

- "A Branch-and-Cut Algorithm for the Multi-Depot Vehicle Scheduling Problem", co-author J. Paixão,IFORS – The sixteenth triennal conference of the International Federation of Operational Research Societies, Edinburgh, UK, July 2002.

- "Exact Algorithms for the Multi-Depot Vehicle Scheduling Problem based on Multicommodity Network Flow Type Formulations ",co-author J. Paixão, 7th International Workshop on Computer-Aided Scheduling of Public Transport, Center for Transportation Studies, Massachusetts Institute of Technology, Boston, USA, August, 1997.

- "Um algoritmo de Decomposição para o Problema de Escalonamento de Viaturas com Multi-Depósitos", co-author J. Pinto Paixão, 7º Congresso da APDIO, Aveiro, Portugal, April 1996.

- "An Multiplier Adjustment Method for the Multiple Depot Vehicle Scheduling Problem",co-author J. Paixão, TRISTAN II, TRIennal Symposium Transportation ANalysis, Capri, Italy, July 1994.

- "Um Algoritmo Exacto para o Problema de Escalonamento de Viaturas com Multi-Depósitos", co-author J. Pinto Paixão, 5º Congresso da APDIO - Associação Portuguesa para o Desenvolvimento da Investigação Operacional, Évora, Portugal, 1992

- "O Problema de Escalonamento de Viaturas com restrições de capacidade nos depósitos ", co-author J. Pinto Paixão, 1ª Conferência em Estatística e Optimização, organized by Centro de Estatística e Aplicações (CEAUL) and Departamento de Estatística, Investigação Operacional e Computação (Universidade de Lisboa), Tróia, Portugal, December 1990.

- "Multiple Depot Vehicle Scheduling Problem: A new heuristic based on Quasi-Assignment Algorithms ",co-author J. Paixão,Fifth international workshop on computer-aided scheduling of public transport, organized by Centre de Recherche sur les transports (C.R.T.) de L´Université de Montréal and by Société de transport de la Communauté urbaine de Montréal (STCUM), Montréal, Canada, August 1990.

- "Heurística para o Problema de escalonamento de Viaturas com Multi-Depósitos", co-author J. Pinto Paixão, 4º Congresso da APDIO (Associação para o Desenvolvimento da Investigação Operacional), Lisbon, December 1989.