Abstract
The insights and benefits to be realised through the optimisation of multiple independent, but conflicting objectives are well recognised by practitioners seeking effective and robust solutions to real-world application problems. Key issues encountered by users of many-objective optimisation (>3 objectives) in a real-world environment are discussed here. These include how to formulate the problem and develop a suitable decision-making framework, together with considering different ways in which decision-makers may be involved. Ways to manage the reduction of computational load and how to reduce the sensitivity of candidate solutions as a result of the inevitable uncertainties that arise in real-world applications are addressed. Other state-of-the-art topics such as the use of machine learning and the management of complex issues arising from multidisciplinary applications are also examined. It is recognised that optimisation in real-world applications is commonly undertaken by users and decision-makers who need not have specialist expertise in many-objective optimisation decision analysis methods. Advice is offered to experts and non-experts alike.
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Notes
- 1.
It should be noted that the term many-objective optimisation is used by the evolutionary community. In the multiple criteria decision-making field, the distinction is typically made between bi-objective problems (with two objectives) and the rest, since the performance of the methods is not as dependent on the number of objectives as in the evolutionary approaches. Therefore, when discussing non-evolutionary methods in this chapter, the term multi-objective optimisation is used, and it does not indicate that the number of objective functions is limited to 3.
- 2.
This exercise was undertaken with financial support from EPSRC, United Kingdom, and Jaguar Land Rover as part of the jointly funded Programme for Simulation Innovation (PSi) (EP/L025760/1). A publication on this particular application exercise is currently being prepared.
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Acknowledgements
Research reported in this chapter is related to the thematic research areas:
– Computational Optimization and Innovation (COIN) Laboratory at Michigan State University (+https://www.coin-lab.org+),
– Intelligent Systems, Decision and Control at The University of Sheffield,
– Decision Analytics utilizing Causal Models and Multiobjective Optimization (DEMO, jyu.fi/demo) at the University of Jyvaskyla,
– Nature Inspired Computing and Engineering (NICE) Group at the University of Surrey, and
– The Decision Analytics for Complex Systems Group at Cornell University.
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Deb, K., Fleming, P., **, Y., Miettinen, K., Reed, P.M. (2023). Key Issues in Real-World Applications of Many-Objective Optimisation and Decision Analysis. In: Brockhoff, D., Emmerich, M., Naujoks, B., Purshouse, R. (eds) Many-Criteria Optimization and Decision Analysis. Natural Computing Series. Springer, Cham. https://doi.org/10.1007/978-3-031-25263-1_2
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