Mathematical Problems in Engineering

Research Article

A Hybrid GRASP+VND Heuristic for the Two-Echelon Vehicle Routing Problem Arising in City Logistics

Algorithm 4

GRASP+VND for 2E-VRP outline.
( ) , Cost( ) ← +
( ) for     to     do
( )    GRASP();
( )    VND( );
( )    if  Cost( ) < Cost( ) then
( )     ;
( )    end if
( ) end for
( ) return the best solution found;