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

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 is the probability that the battery will perform, An undergradu...

An undergraduate business student has purchased a laptop computer for use during exams. This laptop is perfectly reliable except for two parts: its microchip, which has a failure r

Explain private employees to prevent drug, Should urine testing, or other t...

Should urine testing, or other types of testing, be permitted among public and private employees to prevent drug and alcohol abuse? why or why not?

Determine control limits for a c-chart and np-chart, 1. If, instead, a cons...

1. If, instead, a constant sample size of 100 is chosen, determine the np-chart control limits. A later sample produces 15 defectives: what conclusion can be drawn?  2. 1000 bot

Explain an increased velocity in sensing and responding, Discuss an example...

Discuss an example of an unknown-unknown risk that proved damaging to a supply chain. Explain how the following strategies might have mitigated this risk: • Investment in redund

Explain six sigma principles to health care organizations, Type two savings...

Type two savings are the least likely to occur when applying Six Sigma principles to health care organizations

Explain what are the internal and external factors, What are the internal a...

What are the internal and external factors (HR/Business) that will affect the global organization today when doing business overseas

Explain what steps can the uaw take, The United Auto Workers union enters i...

The United Auto Workers union enters into contract negotiations with the Ford Motor Company in Michigan. What are the three main subject areas the UAW can negotiate with Ford? Prov

Leaders are responsible for achieving desired results, Leaders must be held...

Leaders must be held accountable for achieving desired results. What does this mean to you?

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