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In the rst case, the original solution was kept to a certain value of change, and after exceeding it,
the solution was modied into a new one. The solution changes almost in every step when speed was
changed at least in the two edges in the network. Results show that the VRP-TW is very sensitive for
cost changing in the network. In some instances, during decreasing/increasing speed in edges, the
time schedule of routes changed by creating a deviation in arrival time t
i
at customers, even when
the computed solution kept the same sequence of node in routes. In this case, to compensate those
deviations, we can use the DISCON method. The ...