A Modified Priority-Based Encoding for Design of a Closed-Loop Supply Chain Network Using a Discrete League Championship Algorithm

Algorithm 1

The decoding algorithm of each section of representation for two-level supply chain network.

Require: Gets : Set of sources, : Set of depots, : demand on depot , : capacity of source

Ensure: gives : Quantity of shipment between source and depot

(1), ,

(2)while    do

(3)select a node on

(4)

(5)

(6)

(7)end while

(8)

(9)

(10)

(11)while    do

(12)Select a node based on

(13)if   a source is selected   then

(14) select a depot with minimum transportation cost

(15)elseIf   a depot is selected

(16) select a source with minimum transportation cost

(17)end if

(18)

(19)Update demand and capacities:

(20)

(21)

(22)If    then  

(23)If    then  

(24)end while