Fig 1.
The relief logistic network.
Table 1.
Notions for the inventory slack routing problem.
Fig 2.
Illustration of “Slack” at demand sites.
Fig 3.
Illustration of the routing sub-problem.
Fig 4.
Illustration of relief allocation problem.
Fig 5.
An illustrative example for the hierarchical routing problem.
Fig 6.
The separation of sub-areas for individual vehicles.
Table 2.
Delivery quantity arriving at depot in each batch.
Table 3.
List of dispensing rates and starting inventory levels.
Fig 7.
Sensitivity analysis of the relaxation parameter r.
Fig 8.
Resulted vehicle routing plan by the hierarchical routing approach.
Fig 9.
Resulted vehicle routing plan by the sweep approach.
Table 4.
Computational results of different approaches.