Vehicle routing;
Simultaneous pickup and delivery;
Branch-and-cut;
ALGORITHM;
D O I:
10.1016/j.orl.2011.06.012
中图分类号:
C93 [管理学];
O22 [运筹学];
学科分类号:
070105 ;
12 ;
1201 ;
1202 ;
120202 ;
摘要:
We propose a branch-and-cut algorithm for the VRPSPD where the constraints that ensure that the capacities are not exceeded in the middle of a route are applied in a lazy fashion. The algorithm was tested in 87 instances with 50-200 customers, finding improved lower bounds and several new optimal solutions. (C) 2011 Elsevier B.V. All rights reserved.
机构:
Univ Estado Rio de Janeiro, Dept Engn Sistemas, BR-20550900 Rio De Janeiro, BrazilUniv Fed Fluminense, Inst Computacao, BR-24210240 Niteroi, RJ, Brazil