A Heuristic Solution Approach to Order Batching and Sequencing for Manual Picking and Packing Lines considering Fatiguing Effect

Algorithm 1

Batching algorithm upon similarity.

	Step 1: Choose the seed order randomly;
	Step 2: Check batch capacity constraint, go to Step 3 if not exceeding capacity, go to Step 6 otherwise;
	Step 3: Calculate similarity for orders and sort orders by in descending way;
	Step 4: Select order with highest , if multiple orders have same similarity, randomly pick one;
	Step 5: Append order to the seed batch and check batch capacity constraint, go to Step 6 if not exceeding capacity, go to Step 7 otherwise;
	Step 6: Combine order and as a new order , repeat Step 1 Step 6 until all orders are batched;
	Step 7: Output the order batch.