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PERIODIC REVIEW SYSTEM
1.Figure

2.Targer-Level or Maximum-Level
1) T=D(D+L)+SS
T=target (maximum) inventory level
D=demand per unit of time
L=Lead-time duration
R=review-period duration
Ss=safety stock
2) Q=T-I
Q=order quantity
I=Inventory on hand
3) The periodic review system is useful for:
   There are many small issues from inventory, and posting transactions to inventory records are very expensive
    Ordering costs per item need to be kept small
    Many items are orded together to make up a production run or fill a truckload