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

Calculate the expected value, C and S Metal company produces stainless stee...

C and S Metal company produces stainless steel pots and pans. C and S can pursue either of two distribution plans for the coming year. The firm can either produce pots and pans for

Explain is the petterson operations successful, Carrington inc is an intern...

Carrington inc is an international company engaged in the production and distribution of pharmaceutical is the petterson operations successful? To the degree that it can be judged

Role of computers in operations management, what are the changing roles of ...

what are the changing roles of computers in operations management

Explain which path is the critical path, Given the information below: 1....

Given the information below: 1. Construct a network using the AON (Activity on Network method) like we did in class. See problem 3.4 on page 90 and its answer in the Appendix on

Explain what order should these jobs be done, A machine shop has two machin...

A machine shop has two machines, M1 and M2. Four jobs A, B, C, and D need to be processed through machines M1 first and M2 second. Job A will take one hour on machine M1 and three

Competitive priorties, explain basic competitive priorities considered whil...

explain basic competitive priorities considered while formulating operations strategy by a firm?

Explain hidden-camera videos used to promote coke zero, Why do you think th...

Why do you think that the hidden-camera videos used to promote Coke Zero were an effective way to reach its target market? Do you think a similar strategy with a viral marketing ca

Complete the below table using rationale, Complete the below table. Which o...

Complete the below table. Which one of these techniques would you recommend to use and indicate your rationale? Technique Ave Bias Ave MAD MSE Ave MAPE Naïve

Why management scientist to find the optimal solution, Dinoco produces thre...

Dinoco produces three types of oil products: domestic oil, petrol for car and aviation fuel. Each product must meet the minimum average octane regulation. The average octane levels

Explain advantage of using digits to enter categorical, What is the advanta...

What is the advantage of using digits to enter categorical data rather than using words or letters?

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