Algorithms for capacitated vehicle routing
STOC '98 Proceedings of the thirtieth annual ACM symposium on Theory of computing
The Granular Tabu Search and Its Application to the Vehicle-Routing Problem
INFORMS Journal on Computing
Worst-Case Analysis for Split Delivery Vehicle Routing Problems
Transportation Science
Worst Case Analysis for Pickup and Delivery Problems with Transfer
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
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The pickup and delivery problem (PDP) asks to find a set of routes with the minimum travel cost to serve a given set of requests. PDP is called the multi-trip PDP with consecutive pickups and deliveries (PDPCMT) if it has an additional requirement such that any vehicle which has begun a delivery action is not allowed to take pickup actions until all of the loads on the vehicle are delivered. In this paper, we are interested in how the least travel cost can be increased by the additional requirement, and examine the maximum ratio of the optimal value of PDPCMT to that of PDP over all instances with p requests. We show that the maximum ratio is bounded from above by O(logp) and from below by 驴(logp/loglogp).