Tackling complex transportation problems is a core issue in logistics and planning. Solving the pickup and delivery problem with time windows (PDPTW) consists in determining the plan to serve requests using a fleet of vehicles. Each request encompasses delivering goods from one location to another. All vehicles start and finish at the depot, the amount of goods must not exceed the vehicle capacity, each customer must be served within its time window, and the pickup is handled before the corresponding delivery [2]. Exact algorithms for the PDPTW are still not applicable to large-scale scenarios, and approximate algorithms (tabu searches, simulated annealing, guided ejection searches, and numerous other) became a main stream of research [4]. Parallel heuristics deliver high-quality solutions to a wide variety of problems quickly. The co-operation of processes in these algorithms is crucial since it helps guide the search [3]. We propose a parallel guided search (P–GES) to minimize the fleet size in the PDPTW. It extends the guided search
Tackling complex transportation problems is a core issue in logistics and planning. Solving the pickup and delivery problem with time windows (PDPTW) consists in determining the plan to serve requests using a fleet of vehicles. Each request encompasses delivering goods from one location to another. All vehicles start and finish at the depot, the amount of goods must not exceed the vehicle capacity, each customer must be served within its time window, and the pickup is handled before the corresponding delivery [2]. Exact algorithms for the PDPTW are still not applicable to large-scale scenarios, and approximate algorithms (tabu searches, simulated annealing, guided ejection searches, and numerous other) became a main stream of research [4]. Parallel heuristics deliver high-quality solutions to a wide variety of problems quickly. The co-operation of processes in these algorithms is crucial since it helps guide the search [3]. We propose a parallel guided search (P–GES) to minimize the fleet size in the PDPTW. It extends the guided search
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