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 external failure costs, Q 1 The probability associated with rejecti...

Q 1 The probability associated with rejecting a high quality lot is denoted in acceptance sampling with the Greek letter alpha. Q 2 Quality control charts usually have a central

Personal use assets, Rose  considers herself  a relatively conservative inv...

Rose  considers herself  a relatively conservative investor  and  the  score  from her investor profile questionnaire categorizes her as an "income and moderate growth" investor. S

Explain research on leader-member exchange, Write a 750-1,000-word paper th...

Write a 750-1,000-word paper that analyzes the two leadership case studies, "Coach Knight: A Will to Win" and "Coach K: A Matter of the Heart." Address the following questions a

Explain what is the market share, What is the market share, sales levels an...

What is the market share, sales levels and profit for the last 5 years for Subway Restaurant and Chick-Fil-A restaurant?

Explain the link of operations strategy, Question 1: Describe the role ...

Question 1: Describe the role of operations in an Organisation. Link with other functions Issues Types of operational decisions Conclusion Explain the s

Explain negotiated union contract allows workers, A recently negotiated uni...

A recently negotiated union contract allows workers in a shipping department 21 minutes for rest, 12 minutes for personal time, and 15 minutes for delays for each four hours worked

Explain participation of workers in management, Explain Participation of wo...

Explain Participation of workers in management. Workers' Participation in Management: Participation of workers in management can be in any shape, from establishing work-commi

Emba, How many stamping machines are required?

How many stamping machines are required?

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