Number of defects - control chart, Operation Management

Assignment Help:

Number of Defects - Control Chart

Sometimes the attribute of concern is the number of defects (c) in an item rather than the number of defective items in a sample: for example, the number of flaws per square metre of cloth. In this situation the concept of counting non-defects, for comparison with the number of defects found, is meaningless. Such a process typically conforms to the Poisson distribution, of mean value ¯c and standard deviation √ (¯c) and the control limits are determined as:

Warning limits = ¯c ± 1.96 √ (¯c)  

Action limits = ¯c ± 3.09 √ (¯c)


Related Discussions:- Number of defects - control chart

Compute labor productivity change, Eric Johnson makes billiard balls in his...

Eric Johnson makes billiard balls in his New England plant. With recent increases in his costs, he has a newfound interest in efficiency. Eric is interested in determining the prod

Explain average age of the us workforce is increasing, The average age of t...

The average age of the US workforce is increasing and will continue for several years.

Evaluate website effectiveness, Choose any company website and evaluate its...

Choose any company website and evaluate its effectiveness. Write an essay of between 750-1000 words, double-spaced, focusing on such topics as the web site's attractiveness and the

Interdependent sub systems - operations function, Interdependent sub-system...

Interdependent sub-systems A striking feature of complex, open systems is that each comprises a set of highly interdependent sub-systems. For instance, the human body consist

Explain quality circle and high involvement applications, Compare and contr...

Compare and contrast the Quality Circle and High Involvement applications of employee involvement

Define the minimal long-term effect on the environment, Define the minimal ...

Define the minimal long-term effect on the environment. Practices for minimal continuing effect onto the environment: a. Reduction within the use of toxic substances. b.

Explain don''t all firms use similar approaches, Given the success enjoyed ...

Given the success enjoyed by Southwest, Whole Foods, and Google, why don't all firms use similar approaches to managing their employees?

#facility manger, to find a medium that works across 4 other facility sites...

to find a medium that works across 4 other facility sites on how to properly and effectively maintain facility design, to all model after eachother

Formulate the problem of maximizing weekly profit, Problem: A leather c...

Problem: A leather company manufactures leather jackets and leather handbags. A leather jacket requires 8 square feet of leather, while a handbag requires 2 square feet. In ad

Describe experienced unprecedented growth, Your public school district has ...

Your public school district has experienced unprecedented growth and as a result has built the new 500 student North Park Elementary School. The district has three older and small

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