Upper and lower control limits, Operation Management

Assignment Help:

Clerks at Lotsa Data Systems key in thousands of insurance records each day for a variety of client firms.  The process is in control but CEO Donna Lotsa wants to be sure that at least 99.73% of the random variation in the data entry process is included in its control charts' control limits. Samples of the work of 20 clerks are shown in the table below. Lotsa examines 100 records entered by each clerk and counts the number of errors. She also computes the fraction defective in each sample.

Sample Number

Number of Errors

Sample Number

Number of Errors

1

6

11

6

2

5

12

1

3

0

13

8

4

1

14

7

5

4

15

5

6

2

16

4

7

5

17

11

8

3

18

3

9

3

19

0

10

2

20

4

 

 

TOTAL

80

a. What is the appropriate number of standard deviations to include in calculating the upper and lower control limits?

b. What are the upper and lower control limits?

c. Illustrate/state whether the process is in statistical control or not.


Related Discussions:- Upper and lower control limits

What are the chase demand strategies, What are the Chase demand strategies?...

What are the Chase demand strategies? Chase demand strategies: It is just the opposite of a level capacity strategy. The organisation frequently chases customer demand an

Explain because the confidence interval includes zero, A study was done to ...

A study was done to examine whether the perception of service quality at hotels differed by gender. Hotels were randomly selected to rate service items on a 50point scale. The sum

Benchmarking - performance and productivity measures, Benchmarking - Perfor...

Benchmarking - Performance and Productivity Measures Benchmarking is the practice of comparing business practice and in particular performance between companies. It has become

Explain what is the cheapest cost for meeting, ABC Machine Shop, Inc., has ...

ABC Machine Shop, Inc., has a 1-year contract for the production of 48,000 gear housings for a new off-road vehicle. ABC hopes that the contract will be extended and the production

Which kind of portable computer will meet everyones needs, Your organizatio...

Your organization plans to acquire 250 new portable computers. The finance vice president has asked you to lead a project team assigned to define users' computer hardware needs and

Explain the importance of learning curves, Describe the importance of learn...

Describe the importance of learning curves in a services-based operation and how they can be used to increase organization efficiency. Please provide a specific example.

What are the major issues that joe thomas has to deal with?, What are the m...

What are the main issues that Joe Thomas has to deal with?

Need help for assignment, Prob: The 21st Century Studios is about to begin ...

Prob: The 21st Century Studios is about to begin the production of its most important (and most expensive) movie of the year accepted#

Desicion making chapter 1, analyze the decision tree in figure A.8 what is ...

analyze the decision tree in figure A.8 what is the expected payoff for the best alternative? first be sure to infer the missing probabilities

Explain scheduled preventive maintenance, Christopher's Cranks uses a machi...

Christopher's Cranks uses a machine that is designed to produce 100 cranks per hour. The firm operates eight hours per day, five days per week. Due to operating constraints (regu

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd