Affiliations: [a] Scuola Superiore Sant'Anna, Lab. PERCRO, Viale R. Piaggio, 34 – Pontedera, Pisa, Italy | [b] Politecnico di Torino, Dip. Elettronica, C.so Duca degli Abruzzi, 24 – Torino, Italy | [x] Department of Computer Science and Artificial Intelligence, CITIC-UGR, Universidad de Granada, Granada, Spain | [y] Department of Mathematics and Computer Science, University of Salerno, Salerno, Italy | [z] Department of Information Engineering, University of Pisa, Pisa, Italy
Abstract: The paper analyses the issues behind allocation and reordering strategies optimization for an existing automated warehouse for the steelmaking industry. Genetic Algorithms are employed to this purpose by deriving custom chromosome structures as well as ad-hoc crossover and mutation operators. A comparison between three different solutions capable to deal with multi-objective optimization are presented: the first approach is based on a common linear weighting function that combines different objectives; in the second one, a fuzzy system is used to aggregate objective functions, while in the last one the Strength Pareto Evolutionary Algorithm is applied in order to exploit a real multi-objective optimization. These three approaches are described and results are presented in order to highlight benefits and pitfalls of each technique.
