Current on hand inventory = 1308 units
Withdrawal quantity = 95 units
Net quantity post withdrawal = 1308 – 95 = 1213
Since net quantity post withdrawal ( i.e. 1213 ) > Reorder point 1150, IT IS NOT YET TIME TO REORDER
In order to achieve a stable process ,
it is essential that Flow rate ( wafers / hour ) from previous process = Deposition rate ( Wafers/hour ) .
There will be inventory built up if flow rate from previous process > Deposition rate
Given flow rate from previous process = 10.1 wafers/ hour
Total time for deposition process = Heating time + deposition time = 1 hour + 2 hours = 3 hours
Therefore , in order to achieve a stable process, deposition process also must achieve a rate of 10.1 / hour . Thus batch size of the deposition process = 10.1 hour x 3 hours = 30.3 hours
ANSWER : e) 10.1( 1 + 2 ) = 30.3 , SO THE MINIMUM BATCH SIZE IS 30