


1. EOQ=√(2*Annual usage*ordering cost per order)/carrying cost
√(2*4000*20)/100=40 UNITS
2. Safety stock=(Expected rate of consumption*expected increase in the delivery time)+( Expected rate of consumption*normal reorder period)
=Assuming 15% risk of stock out asper question
4000*15%=600units
Safety stock=600*(2+6)/2=2400 units.
Reorder point=normal usage in units*normal lead time+safety stock
=Normal usage=annual usage/360
4000/360=11.11or11units
Normal lead time=(2+6)/2= 4
Safety stock= 11*4+2400= 2444 units.
3. Assuming stock out risk is 5 percent as per the question
Safety stock=(4000*5%)*(2+6)/2=800 units
Reorder level= 11*4+800=844 units
4. Carrying cost and ordering cost remain the same as no change in EOQ.
5. √(2*4000*11.25)/100= 300 units when following JIT
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