• The number of each type of vehicle is enough to handle all
delivery replenishments
• A vehicle can visit some retailers in a single trip
• Transportation cost consists of a fixed vehicle cost and a
fixed retailer-dependent handling cost. A fixed vehicle cost is
incurred when a vehicle used for delivery and a fixed retailerdependent
material handling is incurred when a vehicle arrives
in a retailer warehouse
• All kind of products have the same cubical space, and all the
vehicles have equal capacity