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

Formulate an integer programming model using excel solver, New fire station...

New fire stations are to be located in a city and the major of the city wants to decide where to locate the 2 fire stations. For planning purposes, the region has been divided into

OPERATTION MANAGEMENT, DISCUSS THE ADVISABILITY OF USING MODULAR ASSEMBLIES...

DISCUSS THE ADVISABILITY OF USING MODULAR ASSEMBLIES IN MANFACTURING

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

Explain what is the percentage increase in productivity, Lake Charles Seafo...

Lake Charles Seafood makes 500 wooden packing boxes for fresh seafood per day, working in two 10-hour shifts. Due to increased demand, plant managers have decided to operate three

Lean Synchronisation, Examples of organisations that practice Lean synchron...

Examples of organisations that practice Lean synchronisations

Explain original linear programming problem, Create your own original Linea...

Create your own original Linear Programming problem with a minimum of two variables and two constraints. Your problem should be presented in paragraph form and reflected in a LP eq

Define the average safety capacity, An assembly line normally operates two ...

An assembly line normally operates two shifts a day, five days per week. The planned capacity of the assembly line is 380 units/shift. Determine the average safety capacity if 700

Explain what will be dividend pay-out ratio, Axel telecommunications has a ...

Axel telecommunications has a target capital structure that consists of 70% debt and 30% equity. The company anticipates that its capital budget for the upcoming year will be $3mil

Explain environmentally safe goods and why, Imagine you are a new product t...

Imagine you are a new product that sells for $1.25 an is environmentally safe. Would you spend thousands of dollars for Green Seal on your impulse product if ambivalent toward such

Explain what the law code of hammurabi reveals, • Describe what the Law Cod...

• Describe what the Law Code of Hammurabi reveals about Babylonian culture; consider relations between men and women, slaves and freemen. • Explain whether or not you believe th

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