| Number of perishable shipments (shipments) |
| Number of available routes (routes) |
| Number of route segments (segments) |
| Number of available transportation modes (modes) |
| Number of linear segments in the piecewise decay function for perishable shipment |
| Transportation cost of perishable shipment |
| Handling cost of perishable shipment |
| Decay cost for a perishable product in shipment |