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1. Consider a basic economic order quantity (EOQ) model with the following chara

ID: 3309937 • Letter: 1

Question

1.    Consider a basic economic order quantity (EOQ) model with the

following characteristics:

Item cost:                $15.            

Item selling price:       $20.

Monthly demand:           500 units (constant)

Annual holding cost:      9% of purchase cost

Cost per order:           $18.       

Order lead time:          5 days

Firm's work year:         300 days (50 weeks @ 6 days per week)

Safety stock:             15% of monthly demand

1

Q* the optimal order quantity and reorder point.

a)

500 and 175

b)

400 and 100

c)

400 and 175

d)

400 and 75

e)

none of the above

2

M, the maximum quantity in inventory.

a)

575

b)

475

c)

500

d)

675

e)

none of the above

3

T, the cycle time.

a)

20 workdays

b)

15 workdays

c)

32 workdays

d)

25 workdays

e)

none of the above

4

Total annual inventory cost.

a)

$90,540.00

b)

$540.00

c)

$675.00

d)

$90,641.25

e)

none of the above

5

What is the annual ordering cost?

a)

$18.00

b)

$270.0

c)

$1,080.00

d)

$216.00

e)

none of the above

6

Suppose the vendor demands purchases in multiples of 500 only.

What is the increase in total annual inventory cost that this causes?

a)

$13.50

b)

$0.0

c)

$337.50

d)

$67.50

e)

none of the above

7

What is the average lead time demand?

a)

100

units

b)

16

units

c)

8

units

d)

75

units

e)

none of the above

8

If the standard deviation of the lead time demand is 10 units,

what is the cycle service level with the given safety

a)

100%

b)

95%

c)

99%

d)

75%

e)

none of the above

9

If the standard deviation of the lead time demand is 10 units,

what would be the safety stock if cycle service level is 99%?

a)

75

b)

175

c)

123

d)

100

e)

none of the above

10

Assuming cycle service level of over 99% is not advisable,

what is the annual cost of carrying un-necessary safety stock?

a)

$              70.20

b)

$          1,350.00

c)

$            414.00

d)

$          1,800.00

e)

none of the above

1

Q* the optimal order quantity and reorder point.

a)

500 and 175

b)

400 and 100

c)

400 and 175

d)

400 and 75

e)

none of the above

2

M, the maximum quantity in inventory.

a)

575

b)

475

c)

500

d)

675

e)

none of the above

3

T, the cycle time.

a)

20 workdays

b)

15 workdays

c)

32 workdays

d)

25 workdays

e)

none of the above

4

Total annual inventory cost.

a)

$90,540.00

b)

$540.00

c)

$675.00

d)

$90,641.25

e)

none of the above

5

What is the annual ordering cost?

a)

$18.00

b)

$270.0

c)

$1,080.00

d)

$216.00

e)

none of the above

6

Suppose the vendor demands purchases in multiples of 500 only.

What is the increase in total annual inventory cost that this causes?

a)

$13.50

b)

$0.0

c)

$337.50

d)

$67.50

e)

none of the above

7

What is the average lead time demand?

a)

100

units

b)

16

units

c)

8

units

d)

75

units

e)

none of the above

8

If the standard deviation of the lead time demand is 10 units,

what is the cycle service level with the given safety

a)

100%

b)

95%

c)

99%

d)

75%

e)

none of the above

9

If the standard deviation of the lead time demand is 10 units,

what would be the safety stock if cycle service level is 99%?

a)

75

b)

175

c)

123

d)

100

e)

none of the above

10

Assuming cycle service level of over 99% is not advisable,

what is the annual cost of carrying un-necessary safety stock?

a)

$              70.20

b)

$          1,350.00

c)

$            414.00

d)

$          1,800.00

e)

none of the above

Explanation / Answer

SOLUTION :-

Given Item cost = $15, Item selling price = $20 ,Monthly demand = 500 units (constant) ,

Annual holding cost = 9% of purchase cost, Cost per order = $18 ,Order lead time = 5 days

Firm's work year = 300 days

Annual Demand = 500 * 12 = 6000, Annual Holding cost = 15 * 9% = $1.35

(1)

Q* the optimal order quantity and reorder point

Answer :- (b) 400 and 100

(2)

Maximum quantity in inventory is

Answer :- $475

(3)

Total cycle time is

Answer :- 20 days

(4)

Total Inventory cost is

Answer :- $540

(6)

The increase in total annual inventory cost that this causes is

Answer :- $13.5