A Collection-Distribution Center Location and Allocation Optimization Model in Closed-Loop Supply Chain for Chinese Beer Industry

Procedure 1

Decoding of the priority for the location and allocation problem.

Input. : set of CDCs, ; : set of retailers, and

   : demand of retailer , ,

   : the capability of the CDCs , ; : the return rate of retailer ,

   : unit transportation cost between the CDC and retailer , , ;

   : the priority settled, ,

Output. : the product quantity transported from CDC to the retailer .

    : the product quantity transported from the retailer to CDC .

Step  1. , , , , , ,

Step  2. , ; select a node

Step  3. If , then ; select a CDC,

     ; select a retailer with the lowest cost

     else, ; select a retailer

     ; select a CDC with the lowest cost

Step  4. , : assign the available amount of units

     Update the availabilities on CDC and retailer

     ,

Step  5. If then

    If then

Step  6. If , then calculate transportation cost, find the chosen CDC and return, else go to Step  1.