Operations/Supply Mgmt  HELP!! Who Knows this Stuff?!?!
OTHER SUPPORTING FILES WILL BE GIVEN ONCE ASSIGNMENT HAS BEEN ASSIGNED.
1.(6) The
following table defines a project.
Activity 
Immediate Predecessors 
Activity Time 
A 
 
5 days 
B 
A 
9 days 
C 
A 
8 days 
D 
B 
6 days 
E 
B, C 
4 days 
F 
E 
4 days 
G 
D, F 
3 days 
The minimum time required to complete the project is:
A) 23 days
B) 24 days
C) 25 days
D) 39 days
E) none of the above
2.(4) Use the network given in the Word file in the Final Examination Session under Course Content. The early start time (ES) for job G is:
A) 13
B) 16
C) 21
D) 25
E) 38
3.(5) Use the network given in the Word file in the Final Examination Session under Course Content. The late finish time (LF) for job C is
A) 7
B) 14
C) 16
D) 21
E) 22
4.(5) Use the network given in the Word file in the Final Examination Session under Course Content. The critical path is given by:
A) A → B → E → H
B) A → B → F → H
C) A → B → F → G → H
D) A → D → G → H
E) A → C → F → G → H
5.(4) Use the network given in the Word file in the Final Examination Session under Course Content.
The minimum time required to complete the project is:
A) 23 days
B) 24 days
C) 29 days
D) 31 days
E) none of the above
6.(5) Use the network given in the Word file in the Final Examination Session under Course Content. The slack at activity D is:
A) 0
B) 7
C) 8
D) 13
E) None of the above
7.(4) One part of a PERT project, installing equipment, will most likely be completed in 6 days. However, if there are no worker absences, the equipment can be installed in 3 days. If a member of the work force happens to catch Bubonic Flu, this year’s disease, the installation will take 15 days. What is the expected time (t_{e}) for the equipment installation?
A) 3 days
B) 6 days
C) 7 days
D) 8 days
E) 15 days
8.(6) A firm desires to control inventory levels so as to minimize the sum of holding and order costs. It costs the firm $50 to place an order. The firm estimates its annual carrying charge is 20%. Weekly demand is 100 units, and there are 50 weeks in the work year. The item costs $10 per unit. The leadtime for the product is 3 weeks. Assume that there are 5 working days per week.
What quantity of items should the firm order each time so as to minimize total inventory costs, i.e., what is the EOQ?
A) 100
B) 224
C) 500
D) 1000
E) none of the above
9.(4). Using the data of Question 8: If 400 units are ordered each time (i.e., EOQ = 400), then what will be the total carrying cost per year?
A) $100
B) $200
C) $400
D) $800
E) $4000
10.(3) Using the data of Question 8: If 200 units are ordered each time, how many orders will be placed in a year?
A) 2
B) 5
C) 10
D) 20
E) 25
11.(4) Using the data of Question 8: If 200 units are ordered each time, then the time between orders (in working days) is
A) 2
B) 5
C) 10
D) 20
E) 25
12.(3) Using the data of Question 8: If 1000 are ordered each time, then what will be the total ordering cost per year?
A) $50
B) $100
C) $200
D) $250
E) $300
13.(3) Use the data of Question 8 and assume no safety stock or service level requirement. In order not to run out of stock before the receipt of a new order, at what inventory level should the firm place an order? That is, what is the reorder point equal to?
A) 50
B) 160
C) 200
D) 300
E) 400
14.(4) Given that unit cost = $25, annual carrying charge = 10%, annual
demand = 7500 units and ordering cost = $15 per order. Assume that there are 50 weeks in the work
year and 5 working days per week. The
leadtime for the product is 2 weeks.
The EOQ is:
A) 150 units
B) 212.13 units
C) 300 units
D) 500 units
E) none of the above
15.(2) Ohio Machine Tool Company maintains an inventory pool consisting of 10 items. Each of these items has a unique demand pattern and may require a different kind of inventory management system. The annual demand pattern and the unit cost of these items are given in the following table. Classify the items in A, B, and C categories according to annual dollar usage.
Annual Usage 
Unit Cost 

Item Type 
in thousands 
in Dollars 
Item 1 
10 
$2.50 
Item 2 
30 
$1.25 
Item 3 
20 
$16.00 
Item 4 
10 
$0.75 
Item 5 
20 
$3.00 
Item 6 
30 
$2.50 
Item 7 
60 
$14.25 
Item 8 
22 
$10.00 
Item 9 
100 
$2.75 
Item 10 
300 
$4.25 
Using the above data, Item 7 will be classified as:
A) A item
B) B item
C) C item
D) None of the above
16.(3). Using the data of Question 15, Item 8 will be classified as:
A) A item
B) B item
C) C item
D) None of the above
17.(3) Using the data of Question 15, Item 6 will be classified as:
A) A item
B) B item
C) C item
D) None of the above
18.(6) One end item A requires three component parts: B, C, and D. The bill of material indicates that for each completed A, 3 units of B, 2 units of C, and 1 unit of D are required. Current inventory for the four items is as follows: There are 22 As, 40 Bs, 50 Cs and 35 Ds in stock. If the lead time for all items is one week and there are no scheduled receipts for any item, how many units of product A can be delivered to customers at the start of next week (week 2)?
A) 35
B) 31
C) 25
D) 13
E) None of the above
Use the following data to answer questions 19 and 20.
Product D has gross requirements, onhand inventory, and scheduled receipts as indicated in the timephased inventory status record below. Its lead time is 3 weeks.
Item D 
1 
2 
3 
4 
5 
6 
Gross Requirements 
100 
300 
100 
300 
200 
50 
On Hand/ Scheduled Receipts 
700 

Net Requirements 
A 

Planned Order Releases 
B 
19.(3) The value of entry A is:
A) 100
B) 200
C) 300
D) 700
E) None of the above.
20.(4) The value of entry B is:
A) 50
B) 300
C) 250
D) 200
E) None of the above
21.(3) Use the BOM given in the Word file in the Final Examination Session under Course Content. If the master schedule calls for the production of 50 units of A, how many units of E are needed?
A) 50
B) 100
C) 200
D) 400
E) None of the above
22.(5) Use the BOM given in the Word file in the Final Examination Session under Course Content. If the MPS calls for the production of 50 units of item A, how many units of item D are needed?
A) 200
B) 300
C) 400
D) 500
E) None of the above
23.(7) Use the BOM given in the Word file in the Final Examination Session under Course Content Now assume that 50 units of item A are called for by the MPS. Onhand inventory consists of 20 units each of items A, B, D and E. What is the net requirement for item D?
A) 220
B) 160
C) 120
D) 100
E) None of the above
24.(4) The master production schedule for two products, A and B, is shown below. To manufacture item A, four (4) units of component C are required. To manufacture item B, three (3) units of component C are required. Using this information, determine the gross requirements for component C to start week 1.
Master Production Schedule: Wk 1 

Product A 
30 
Product B 
25 
A) 195
B) 220
C) 155
D) 190
E) None of the above
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