Operations Management
17th Edition
ISBN: 9781259142208
Author: CACHON, Gérard, Terwiesch, Christian
Publisher: Mcgraw-hill Education,
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Chapter 5, Problem 3PA
a)
Summary Introduction
To identify: The bottleneck point according to the current staffing plan.
b)
Summary Introduction
To determine: The capacity of the process expressed in approved cases per day.
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. To obtain your first driver’s license, you must successfully complete several activities.First, you must produce the appropriate identification. Then, you must pass a writtenexam. Finally, you must pass the road exam. At each of these steps, 10 percent, 15 percent, and 40 percent of driver’s license hopefuls fail to fulfill the step’s requirements.You are only allowed to take the written exam if your identification is approved, andyou are only allowed to take the road test if you have passed the written exam.Each step takes 5, 3, and 20 minutes, respectively (staff members administering writtenexams need only set up the applicant at a computer). Currently, the DMV staffs 4 peopleto process license applications, 2 to administer written exams, and 15 to judge the roadexam. DMV staff work 8 hours per day.a. Where is the bottleneck, according to the current staffing plan?b. What is the capacity of the process (expressed in approved cases per day)?
Suppose you have a process that requires 20 minutes for start up, 13 minutes for Task #1, 15 minutes for Task #2, and 18 minutes for Task #3. Which of the following is true?
Group of answer choices
This process has one or more tasks that are blocking other tasks.
None of these answers is correct
This process has one or more tasks that are starving other tasks.
This process has one or more tasks that are multi-staging other tasks.
This process has one or more tasks that are buffering other tasks.
Before completing production, a product must passthrough three stages of production. On the average, a newproduct begins at stage 1 every 6 minutes. The average timeit takes to process the product at each stage is as follows:stage 1, 3 minutes; stage 2, 2 minutes; stage 3, 1 minute.After finishing at stage 3, the product is inspected (assumethis takes no time). Ten percent of the final products arefound to have a defective part and must return to stage 1 andgo through the entire system again. After completing stage3, 20% of the final products are found to be defective. Theymust return to stage 2 and pass through 2 and 3 again. Onthe average, how many jobs are in the system? Assume thatall interarrival times and service times are exponential andthat each stage consists of a single server.
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