Direct Representation and Variation Operators for the Fixed Charge Transportation Problem
The fixed charge transportation problem (FCTP) has been tackled by evolutionary algorithms (EAs) using representations like permutations, Prüfer numbers, or matrices. We present a new direct representation that restricts search to basic solutions and allows using problem- specific variation operators. This representation is compared w. r. t. locality and performance to permutations and Prüfer numbers. It clearly outperforms all other EAs and even reaches the solution quality of tabu search, the most successful heuristic for the FCTP we are aware of.
KeywordsTabu Search Mutation Operator Basic Solution Solution Quality Transportation Plan
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