operations management

Sheet1

303 Exam 2 SUM II 2013

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Date: 7-19-2013 Time: 5pm to 9pm.
1. ABC Co. purchases an item. The annual demand for this item is 75000 units. The
ordering cost is $60 per order. The holding cost is $4 per unit per year. The lead time
for this item is 3 days. Assume 250 working days per year.

Find:
a) Economic order quantity, EOQ.
b) What is the optimal number of orders per year.
c) What is the annual cost of ordering and holding inventory.
d) What is the re-order point.
2. ABC Co. manufactures a subcomponent at the rate of 400 per day when required.
Its annual demand for this item is 50000 units. Assume 250 working days per year.
Holding cost is $10 per unit per year. Set-up cost is $150 per set-up. Find:
a) Economic production quantity.
b)How many production runs will be made per year.
c)What will be the maximum inventory level.
d) What percentage of time during the year will this item be produced.
e) What is the annual cost for ordering and holding inventory.
3. Hotel ABC has contracted out its towel laundering work. The lead time for the contractor
is 2 days. The daily demand for clean towels at the hotel is normally distributed with a mean of
800 and a standard deviation of 150. Management has set the service level 95%.
For this service level, Z = 1.64
a) The Reorder point.
b) Safety stock.
4. A printing company has a contract with a legal firm to copy their court documents. Daily demand
is a constant at 10000 pages to be copied. The mean lead time for the contractor is 4 days with
a standard deviation of 1.25 days for delivering copies. Find the re-order point
for the law firm. The desired service level is 95%. The corresponding Z =1.64.

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