Abstract: Bulky cargo dispatching problem is complex which is affected by many factors.Generally speaking,large quantity,long distance and limited time are attached to bulky cargo dispatching problem.How to coordinate supply,demand and transportation capacity and assure the benefit of purchase department is the main problem studied by the paper.First,the paper puts forward the dispatching mode.Then dispatching planning model is established according to the rules that include achieving quantity discount,just-in-time purchase,decreasing inventory and coordinating transport capacity.The solution shows that using the model one can achieve the aim of decreasing purchase cost and coordinating transport capacity.

Key words: dispatching planning, quantity discount, just-in-time, transportation capacity, bulky cargo