Attributes - statistical process control, Operation Management

Assignment Help:

Attributes - Statistical Process Control

On the other hand, some processes have outputs with attributes to be controlled where counting the number of defects is more appropriate than measuring them. The outputs can be segregated into two categories (eg pass/fail or non-defective/defective). For example, in bottle production, the design requirement may stipulate a maximum allowable number of air bubbles in the glass. Bottles which have no more than this number of bubbles would be counted as non-defective items; bottles with more than this number would be counted as defective items. Returning to the example of controlling the diameters of discs, it might be decided, perhaps for reasons of economy, that it is more appropriate to gauge the diameters rather than measure them. This figure shows how this can be achieved by use of a simple go/not-go gap gauge. Conforming discs, as shown in this figure, will be small enough to enter the 'go' gap, but too large to enter the 'not go' gap. As a result the output will be segregated into countable 'pass' and 'reject' groups.

1070_Attributes - Statistical Process Control.png

Much of what follows concerns the construction and use of statistical process control charts for both categories of output. The main treatment focuses on two complementary charts, sample mean and sample range charts, for the control of variables. This is followed by accounts of three charts for the control of attributes: proportion defective, number defective and number of defects.


Related Discussions:- Attributes - statistical process control

Explain stategic partnering, An export trading company assists businesses i...

An export trading company assists businesses in creating relationships with foreign customers and suppliers to assist in selling goods in overseas markets , This global strategy is

Which kind of portable computer will meet everyones needs, Your organizatio...

Your organization plans to acquire 250 new portable computers. The finance vice president has asked you to lead a project team assigned to define users' computer hardware needs and

Explain company to suspect there is unmet demand, Describe some of the cues...

Describe some of the cues that might cause a company to suspect there is unmet demand for its products or services. How would you design a test to determine whether your suspicions

Define the amount of fabric she needs is to forecast, The percentage of val...

The percentage of value of shipments that come from materials for the average manufacturer is: a. greater than or equal to 40 and less than or equal to 49 percent. b. greater than

What is grapevine, What is Grapevine? Ans: Grapevine is an informal ...

What is Grapevine? Ans: Grapevine is an informal communication system.

Productivity of the organisation, Productivity of the Organisation Pro...

Productivity of the Organisation Productivity of the organisation is normally an operations problem - the operations function is usually the area of the company with the large

Explain why has globalization become so important, What specific challenges...

What specific challenges P&G and Colgate-Palmolive face, and why has globalization become so important to them?

Through television marketing how do consumers select quality, Through telev...

Through television marketing how do consumers perceive different brands as being the best quality?

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