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TO 313: Practice Problems on Process Analysis

Textbook Questions Chapter 1 (pp. 21-23)

Problems: 2, 3(a), 4(a), 5, 6, 7, 8, 9(a), 10(a)

Additional Problems from Chase, Aquilano, Jacobs (12th edn)

Problems: 2, 3, 4, 5, 7 on pp. 3-4 of this document.

Additional Problems

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1. State in your own words what Little’s Law means. Think of an example that you
have observed where Little’s Law applies.

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2. On a typical weekday in January, 4,200 customers visit the Ypsilanti Wal-Mart. It is

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estimated that, on average, there are 350 customers in the store. Assuming that the
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store is open 14 hours a day, how much time does the average customer spend in
the store?
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3. In 2006, Shouldice Hospital admitted 14,965 patients. In 2007, a 20% increase in


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admissions is expected. Currently the hospital has 390 beds. Assume the hospital
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operates 365 days a year (and, please assume one patient per bed!).
a) If the average patient stays in the hospital 8 days, how many beds were
empty, on average, in 2006?
b) On average, how many beds do you expect to be empty in 2007?
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4. The total number and gender mix of employees in a certain company remains
constant. Due to turnover, on average the company hires 150 men and 200 women
each year. It is estimated that on average a woman stays 50% longer than a man.
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What proportion of the employees are women?


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5. The Internal Revenue Service Department of Tax Regulations writes regulations in


accord with laws passed by Congress. On average, the department completes 300
projects per year. The Wall Street Journal reports that, as of October 11, 1997, the
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number of projects currently “on the Department’s plate” is 588. Nevertheless, the
department head claims that average time to complete a project is under six
months. Do you have any reason to disagree? Why or why not?

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6. A bank finds that the average number of people waiting in line during lunch hour is
10. On average, during this period 2 people per minute leave the bank after
receiving service. On average, how long do bank customers wait in line?

7. At the drive-through counter of a fast-food outlet, an average of 10 cars wait in line.


The manager wants to determine if the length of the line impacts potential sales.
Her study reveals that, on average, 2 cars per minute try to enter the drive-through
area, but 25% of these cars are dismayed by the long line and simply move on
without entering the line and placing orders. Assume that no car entering the line
leaves without service. On average, how long does a car spend in the drive-through
line?

8. Checking accounts at a local bank carry an average balance of $3,000. The bank
turns over its balance six times a year. On average, how many dollars flow through
the bank each month?

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This study source was downloaded by 100000834357030 from CourseHero.com on 10-27-2021 08:01:35 GMT -05:00

https://www.coursehero.com/file/11664724/TO-313-Process-Analysis-Practice-Problems/
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