This article is all about part period balancing. It tells about the PPB heuristic method, importance of PPB and other heuristic methods to determine the lot size.Part period balancing is a lot-size technique. It chooses a lot-size that equals the demand for storage cost to the lot size. Lot size determines the quantity ordered during production. Other heuristic methods to determine lot size are - Fixed order quantity- Lot-For-Lot- Economic Order Quantity-Silver- Meal Heuristic- Least Unit Cost- Periods of Supply- Period Order Quantity- Least total Cost