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

Define cross-cultural communication, When referring to Cross-Cultural Commu...

When referring to Cross-Cultural Communication, what would be the best approach to dealing with a multicultural environment.

Explain methods for the number of gallons of gasoline, Following are two we...

Following are two weekly forecasts made by two different methods for the number of gallons of gasoline, in thousands, demanded at a local gasoline station. Also shown are actual de

Describe the risks associated with levelling resources, Explain the risks a...

Explain the risks associated with levelling resources, compressing or crashing projects, and imposed durations, or catch-up, as the project is being implemented.

Explain survival of the fittest, From an evolutionary standpoint, is "survi...

From an evolutionary standpoint, is "survival of the fittest" selfish or selfless?

Explain virtualization to support pandora''s business growth, Assess the us...

Assess the use of virtualization to support Pandora's business growth while helping the environment.

Compute the npv, Expando, Inc., is considering the possibility of building ...

Expando, Inc., is considering the possibility of building an additional factory that would produce a new addition to their product line. The company is currently considering two op

Case study, Bloomsday Outfitters produces T-shirts for road races. They nee...

Bloomsday Outfitters produces T-shirts for road races. They need to acquire some new stamping machines to produce 30,000 good T-shirts per month. Their plant operates 200 hours per

Explain barriers to advancement opportunities for women, What are some of t...

What are some of the barriers to advancement opportunities for women and minorities in many organizations?

Generate a table that includes all of the key elements, Create a table that...

Create a table that includes all of the key elements that you think an organization must focus on to promote change

Explain transnational model, Q1. Is changing the organization's domain a fe...

Q1. Is changing the organization's domain a feasible strategy for coping with a threatening environment? Can you think of an organization in the recent news that has changed its do

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