LittleField Technology Quiz
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School
University of Manitoba *
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Course
2160
Subject
Industrial Engineering
Date
Dec 6, 2023
Type
docx
Pages
6
Uploaded by GrandLightning10101
SCM 2160. Operations and Supply Chain Management Fall 2023
Little Field Simulation Quiz
Team members: "You are required to answer the following questions using the information provided in the UMLearn
handout and the historical data spanning 50 days from your factory."
1. What is Littlefield’s product? d. Digital satellite receivers
a.
Component kits
b.
Blood test results
c.
Lead time contracts
d.
Digital satellite receivers
e.
Industrial chemicals
2. What determines the winner of Littlefield Labs at the end of the competition? d. Highest cash position
a. The highest quality
b. The lowest cost
c. The highest earnings
d. The highest cash position
3. What is the cost of placing an order for 600 kits of materials, which is enough to fill ten customer orders? b. $7,000
a.
$36,000
b.
$7,000
c.
$6,000
d.
$1,600
e.
$600
$1000 per materials order + $10 per kit x 600 kits = $7000
4. Materials inventory becomes available in the factory ___ simulated hours after placing an order. e. 96 hours
a. 24 hours
b. 36 hours
c. 48 hours
d. 72 hours
1
e. 96 hours
4 days * 24 hours = 96 hours
5. Assume the number of jobs arriving to the factory each day
are statistically independent and normally
distributed with a mean of 9 jobs and a standard deviation of 3 jobs. What is the lowest reorder point below that would provide a service level of 99%? b. 36 x 60 kits
a. 9 x 60 kits
b. 27 x 60 kits
b. 36 x 60 kits
c. 50 x 60 kits
d. 60 x 60 kits
reorder point = cyclye inventory + safety stock = dL + Z(sigma) sqrt (L) = 9(4) + [norm.inv(0.99)](3)sqrt(4) = 49.95 ~ 50 lots or 50*60 kits
6. If a job is accepted under a contract with quoted lead time of 7 days, maximum lead time of 14 days, and revenue per order of $750, how much revenue will it earn if it is completed in exactly 10 days?
b. $321
a. $0
b. $321
c. $375
d. $429
e. $510
750-750*(10-7)/(14-7) = $428.57
7. What is the materials economic order quantity in kits if 9 jobs arrive each day? Hints: The holding cost per year is the amount of interest lost when the cost of a kit is in inventory instead of earning interest in the bank. Be sure all your units are consistent – e.g., jobs and years vs kits and days. d. 331 x 60 kits
a. 17 x 60 kits
b. 36 x 60 kits
c. 104 x 60 kits
2
d. 331 x 60 kits
e. 810 x 60 kits
D = 9*365 = 3,285
Ordering cost, S = 1000
Holding cost as a percent of the lot value = 0.1,
Order lot value = 600
Sqrt[2*1000*(9*365)/(0.1 x 600)] = 331
8. What is the expected long-run average utilization of a board stuffer at station 1, if there are 3 board stuffers at station 1 and an average of 9 jobs arrive each day? c. 66% utilization (utilizaton = total busy time/total available time -> total busy time = 64.33+122.50+60.32+...+477.09, total available time = 50x3 (days available multiplied by # of board stuffers) a.
38%
b.
48%
c.
66%
d.
100%
e.
200%
Station 1 (Board Stuffer):
Processing time = 5.3 hours,
Capacity per hour = 1/5.3 = 0.19 jobs/hour,
3 stuffers * 0.19 = 0.57 jobs/hour
Workload per hour = 9/24 = 0.375
OR
Capacity per day = 24/5.3 = 4.52
3 stuffers *4.52 = 13.58
Workload per day = 9
Utilization = workload / capacity = 0.375/0.57 = 0.6578 ~ 66%
9. If 25 jobs arrive each day, what is the smallest number of testers that would be required to achieve a long-run average tester utilization of less than 80%? e. 5 (using Little’s Law 25x0.66x50/0.8 = 5)
a. 1
b. 2
c. 3
3
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d. 4
e. 5
1.9 hours (step 2 + step 4 = 0.5 + 1.4 = 1.9 hours)
= (1.9 x (25/24)) / 0.8 = 2.47 which rounds up to 3. YOU WILL NEED TO LOG INTO THE GAME, VIEW THE FIRST 50 DAYS OF DATA AND DOWNLOAD /
ANALYZE SOME OF THAT DATE TO ANSWER THE FOLLOWING QUESTIONS
1. What is the average daily arrival rate of jobs per day to the factory? c. 11.3
a.
9.1
b.
10.2
c.
11.3
d.
12.4
e.
13.5
2.What is the standard deviation of the daily number of jobs arriving to the factory? a. 3.5
a.
3.5
b.
4.4
c.
5.3
d.
6.2
e.
9.1
3. Which of the following actions would reduce the average queue length of jobs waiting for raw materials? e. buy another tuner
a.
Raise the materials reorder point
b.
Reduce the materials order quantity
c.
Buy another stuffer
d.
Buy another tester
e.
Buy another tuner
4. About how much interest was earned on outstanding cash during the last 50 days? d. $14,000
a. $0
b. $14
c. $140
d. $14,000
e. $430,000
5. What was the only day when the average lead time of completed jobs exceeded 5 days? b. 29
a. 13
4
b. 29
c. 35
d. 43
e. 50
6. How many materials stockouts occurred in the last 50 days? A stockout is when inventory reaches zero. e. four
a. none
b. one
c. two
d. three
e. four
7. If only one action is taken, which of the following actions in isolation would increase the long-run average daily revenues? e. None of the bove
a. Purchase one stuffer
b. Reduce the reorder point
c. Reduce the order quantity
d. Change the contract e. None of the above
8. Which of the following would not
reduce the long-run average lead time of jobs through the factory? e. Reduce the materials order quantity
a. Buy a stuffer
b. Buy a tester
c. Buy a tuner
d. Raise the materials reorder point
e. Reduce the materials order quantity
9. On what day did none of the stuffers spend any time processing any jobs? c. 34
a. 10
b. 22
5
c. 34
d. 47
e. 50
10. What was the total revenue from all jobs completed on day 50? a. $750
a. $750
b. $8,600
c. $10,500
d. $11,730
e. $15,000
6
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