MULTIPLE CHOICE.
Choose the one alternative that best completes the statement or answers the question.
1) Customers arrive at the local grocery store at a steady rate of 40 an hour. Thirty percent of these customers purchase 10 items or less and go to the express line where they enjoy an average checkout time of 5 minutes. Customers that don't meet the express line criterion go to checkout line #2 where they spend an average of 10 minutes checking out. How many people are checking out in line #2 on average?
A) less than or equal to 1.0
B) greater than 1.0 but less than or equal to 3.0
C) greater than 3.0 but less than or equal to 5.0
D) greater than 5.0
2) Students arrive at a university business library during peak evening hours at a rate of 40 students every half hour. Each student stays an average of two hours. On average, how many students are in the library at any one time?
A) less than or equal to 40 students
B) greater than 120 students
C) greater than 40 but less than or equal to 80 students
D) greater than 80 but less than or equal to 120 students
3) Customers arrive according to a Poisson distribution. The average number of customer arrivals per hour is six. The probability that four customers will arrive in the next three hours is:
A) less than or equal to 0.01.
B) greater than 0.01 but less than or equal to 0.02.
C) greater than 0.02 but less than or equal to 0.03.
D) greater than 0.03.
4) Customers arrive every three minutes governed by a Poisson distribution. A single server is capable of handling twenty-five customers per hour and this service time is exponentially distributed. About how long do customers wait in line?
A) exactly twenty minutes B) a little over nine minutes
C) exactly twenty-five minutes D) a little over thirteen minutes
The figure above shows the process for customers arriving at Pierre's Spa and Salon. After signing in, customers are routed to different locations in the Spa for the two different services provided. The numbers in parentheses are the time in minutes for each step of the process. (Identification and management of bottlenecks)
5) Use the information in Table 7.3. What is the throughput time for the A-B-C-D -H routing? 5)
A) 30 minutes B) 23 minutes C) 53 minutes D) 48 minutes
6) Use the information in Table 7.3. What is the throughput time for the A-B-E-F-G-H routing? 6)
A) 53 minutes B) 48 minutes C) 23 minutes D) 30 minutes
7) Use the information in Table 7.3. What is the process bottleneck? 7)
A) H B) B C) C D) D
8) The production of 240 units during a 480-minute work shift results in a takt time of: 8)
A) 24 seconds. B) 120 seconds. C) 30 seconds. D) 240 seconds.
Use the following to answer the questions below. (Inventory and Supply Chains)
Shipments of Product X from a plant to a wholesaler are made in lots of 600. The wholesaler's average demand for X is 100 units per week. Lead time from plant to wholesaler is 4 weeks. The wholesaler pays for the shipments when they leave the plant.
9) Refer to the instruction above. What is the total of the wholesaler's current cycle plus pipeline inventories?
A) 400 units B) 700 units C) 300 units D) 100 units
10) Refer to the instruction above. If the plant reduces its lead time from 4 to 2 weeks and keeps its 600 unit lot size, what is the wholesaler's new total cycle plus pipeline inventories?
9)
10)
A) 700 units B) 300 units C) 500 units D) 200 units
11) Refer to the instruction above. If the plant reduces its shipment lot size from 600 to 400 units and keeps its 4 week lead time, what is the wholesaler's new total cycle plus pipeline inventories?
A) 300 units B) 600 units C) 500 units D) 400 units
12) Refer to the instruction above. Which of the following situations results in the wholesaler's total cycle plus pipeline inventories amounting to 550 units?
A) plant shipment lot size of 400 and plant-to-wholesaler lead time of 3 weeks
B) plant shipment lot size of 600 and plant-to-wholesaler lead time of 4 weeks
C) plant shipment lot size of 400 and plant-to-wholesaler lead time of 2 weeks
D) plant shipment lot size of 500 and plant-to-wholesaler lead time of 3 weeks
13) Refer to the instruction above. Which of the following situations results in the wholesaler's total cycle plus pipeline inventories amounting to 400 units?
A) plant shipment lot size of 400 and plant-to-wholesaler lead time of 2 weeks
B) plant shipment lot size of 500 and plant-to-wholesaler lead time of 3 weeks
C) plant shipment lot size of 600 and plant-to-wholesaler lead time of 4 weeks
D) plant shipment lot size of 400 and plant-to-wholesaler lead time of 3 weeks