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

Explain drink equally appealing to men, Do you think Diet Coke could have b...

Do you think Diet Coke could have been repositioned to change consumers' perceptions of it enough to be considered a drink equally appealing to men? Why or why not?

Depict an activity on arrow network, Project involves 12 activities and the...

Project involves 12 activities and the precedence relationship is provided below in brackets. (1) Draw an activity on arrow network to represent the project tasks and their depende

Process focused production system, Process Focused Production System Th...

Process Focused Production System This is a form of production system in which production operations are grouped according to the type of process. In other words, all productio

Explain less of each of the inputs of production, All else constant, as the...

All else constant, as the price of petroleum increases relative to the prices of other inputs to the production process, in their effort to minimize their total costs of production

Availability of labour and amenities, Availability of Labour and Amenities ...

Availability of Labour and Amenities Availability of Labour and skills: Certain geographical area has traditional skills but is very are that a location can be found which h

Define what law either allow or prohibits this behavior, Cecilia is a 14-ye...

Cecilia is a 14-year old freshman at United High School. She works from 2pm to 10pm three days a week. In order to get to work on time she leaves school early missing her last clas

How enhance organizational behaviour, According to Morgan (2006), "All theo...

According to Morgan (2006), "All theories of organization and management are based on implicit images or metaphors that lead us to see, understand, and manage organizations in dist

Explain environment that best serves the organization, Briargrove is taking...

Briargrove is taking proposals for a Centralized Learning Network to be rolled out first in the corporate office in Dallas, TX and then across the organizational footprint. A priva

Briefly explain two arguments raised in the text, Briefly state two argumen...

Briefly state two arguments raised in the text for and against tort reform

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