A Multifactory Integrated Production and Distribution Scheduling Problem with Parallel Machines and Immediate Shipments Solved by Improved Whale Optimization Algorithm

Algorithm 1

Decoding Mechanism .

Input data

, , , : indexes and number of orders, customers, factories, machines;

npop: number of population;

sort: sort descending

: random variable

procedure

;

of sorted by as the priority vector of orders;

;;

of sorted by as the priority vector of customers;

for

 for

  select a random factory to be assigned to order of customer

  select a random machine at factory to be assigned to order of customer

  set ;

  if order is proceeding the order on then: ,

 end;

end;