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

Abc analysis, how to find percentage of annual volume

how to find percentage of annual volume

Explain two operations-related tasks carried out by firm, Identify two oper...

Identify two operations-related tasks carried out by Hard Rock Café

Valuate the production quantity, Using the data, suppose the manufacturer h...

Using the data, suppose the manufacturer has an inflated demand forecast as follows: Quantity Probability 2,200 5% 2,300 6% 2,400 10% 2,500 17% 2,600 30% 2,700

String diagram, String diagram is a simple tool for analyzing and desi...

String diagram is a simple tool for analyzing and designing work space such that movement can be minimized. The basic diagram is a scale plan or model on which a t

Concept of trade off in business strategy, Concept of Trade off in Business...

Concept of Trade off in Business Strategy The trade-off concept was first introduced by Skinner (1969,1974) who carried out a large study of successful American manufacturing

Linear programming, classification of linear programming on the basis of st...

classification of linear programming on the basis of structure

Explain what is the expected value with perfect information, ABC Company, a...

ABC Company, a soft-drink vendor, has created a table of payoffs for three stocking decisions for three different states of nature: States of nature (Demand) Alternatives He

Sffdfd, Why mary parker follett ideas tended to be popular

Why mary parker follett ideas tended to be popular

What leadership is give answer in thirty seconds, If someone asked you to t...

If someone asked you to tell them what leadership is, and you only had thirty seconds to answer, what would you say?

Explain what is the tax on salvage value, Mars Inc. is considering the purc...

Mars Inc. is considering the purchase of a new machine that will reduce manufacturing costs by $5,000 annually. Mars will use the MACRS accelerated method to depreciate the machine

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