Improved solutions for the traveling purchaser problem
Computers and Operations Research
Communications of the ACM
Approximation Algorithms for the Traveling Purchaser Problem and its Variants in Network Design
ESA '99 Proceedings of the 7th Annual European Symposium on Algorithms
Ant colony optimization for the traveling purchaser problem
Computers and Operations Research
The multiple traveling purchaser problem for maximizing system's reliability with budget constraints
Expert Systems with Applications: An International Journal
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For the Traveling Purchaser Problem we describe improvement subprocedures that can be incorporated in known heuristics. Computational results show the effectiveness of these subprocedures in general savings, commodity adding and tour reduction heuristics for test instances up to size 200 and four different cost types, including both symmetric and non symmetric costs as well as coordinate based costs. The average improvement of the solutions is substantial, i.e., from three to more than seven times smaller gaps for the best heuristic, based on savings.