Purpose

The purpose of the quiz is enhancing your understanding of basic process analysis definitions and calculations.

This assignment will help you to develop:

• Module 1.3 Objectives 1, 2, 3, 4 and 5 (CO 1.2 )

Task

Please download and print the attached document.

Work on the questions. Once you are convinced that you have provided the best answer to each question take the quiz on-line . The on-line quiz has the same questions, however answers may be shuffled. Be careful to choose the correct answer. You will have30 minutes to complete the quiz once you start taking it.

SCM 424 – Quiz 3

Factory Physics

1. In a perfect process with no variability, what is the required condition to have no waiting lines?
   1. Arrival rate must be less than capacity
   1. Output rate must be less than capacity
   1. Capacity must be less than arrival rate
   1. Output rate must be equal to capacity
2. In a stable process, will the rate of product or customers out of the process (output rate) equal the rate into the process (arrival rate or the rate at which products are released to the process)?
   1. Yes
   1. No
3. In a stable process, is the output rate always equal to the capacity of the process?
   1. Yes
   1. No

• At the supermarket a checkout operator has on average 8 customers and a customer arrives every 3 minutes on average. How long must each customer wait in line on average?

1. 26 minutes
   1. 22 minutes
   1. 20 minutes
   1. 24 minutes
2. How does variability in a process affect the WIP levels and MTT?
   1. Has no effect on them
   1. Increased variability helps decrease the WIP levels and MTT
   1. Increased variability increases WIP levels and MTT
   1. It affects them in opposite ways
3. How does utilization in a process affect the WIP levels and MTT?
   1. Has no effect on them
   1. Increased utilization increases the WIP levels and MTT
   1. Increased utilization helps decrease WIP levels and MTT
   1. It affects them in opposite ways
4. How does variability affect the impact of utilization on WIP and MTT?
   1. Has no effect on the impact of utilization on WIP and MTT.
   1. It helps decrease the impact of utilization on WIP levels and MTT.
   1. Increased variability increases impact of utilization on WIP and MTT.
   1. Increased variability affects the impact of utilization on WIP and MTT in opposite ways.

• A restaurant holds about 30 people (seated and waiting to be seated) on average and the average person will be there about 90 minutes.  If the restaurant queue has on average 25 people already seated, how long does each customer have to wait on average to be seated? (Hint: First find the throughput (output) rate for the restaurant when it is full)

1. 12 minutes
2. 19 minutes
3. 17 minutes
4. 15 minutes
5. How do MTT, cycle time, and WIP level link to each other?
   1. Cycle Time is equal to MTT divided by WIP
   1. MTT is equal to WIP times Cycle time
   1. WIP is equal to MTT divided by Cycle time
   1. All of the above
6. What is the impact of pooling resources (so that each resource can produce any type of product) on MTT? Assume that everything else is kept intact.
   1. MTT will decrease
   1. MTT will increase
   1. Pooling resources has no impact on MTT
   1. Dedicating resources is always improves MTT