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

Explain developing a risk matrix, How would you go about developing a risk ...

How would you go about developing a risk matrix? Give an example of the kinds of factors that should be evaluated.

Explain europe and japan to adopt the new product, What triggered the new p...

What triggered the new product strategy at Minnesota Biolabs? 2. What prediction would you make for the success of getting the country general managers in Europe and Japan to adopt

Line balancing, what do you understand by line balancing? what happens if b...

what do you understand by line balancing? what happens if balance does not exist?

What is utility of optimised production technology, Q. What is utility of o...

Q. What is utility of optimised production technology to manufacturing operations? Optimised production technology (OPT) optimises the employ of ‘bottleneck resources' (restric

Discuss illiteracy and poor diets, Illiteracy and poor diets have been know...

Illiteracy and poor diets have been known to cost countries up to what percent of their productivity?

Compounded annually means, What is the present value of $10000 to be receiv...

What is the present value of $10000 to be received 20 years from now , if the principle is invested at 8% per year, compounded annually ?

Explain the front-room and back-room services, Identify the front-room and ...

Identify the front-room and back-room services for the following organizations. Could these services be improved by increasing or decreasing the degree of customer contact? By sepa

Determine the standard time, An 8 hours work measurement  study  in a plant...

An 8 hours work measurement  study  in a plant reveals the following : Units  produced= 320 nos. Idle  time = 15%  performance rating-= 120% . allowances  = 12% of normal  time. De

Development of bar chart, Development of Bar Chart The following are ...

Development of Bar Chart The following are significant stages in developing a bar chart: 1)Breakdown: The project into its various activities or jobs or operations each

Explain compensation plan, Do you believe a compensation plan based 100% on...

Do you believe a compensation plan based 100% on commission would ever be justified? Give an example for either option.

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