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 cango is looking at ways to grow its business, CanGo is looking at ...

CanGo is looking at ways to grow its business. How should they approach the decision on how to do it?

How to formulate a linear programming model, George Johnson recently inheri...

George Johnson recently inherited a large sum of money; he wants to use a portion of this money to set up a trust fund for his two children. The trust fund has two investment optio

What are the characteristics of service organisations, What are the charact...

What are the characteristics of service organisations? The characteristics of service organisations are as given below: a. Intangibility for illustrations no physical subs

Calculate the tracking signal, Sales of music stands at Johnny Ho music sto...

Sales of music stands at Johnny Ho music store in Columbus, Ohio, over the past 10 weeks are shown in the table below. a) Forecast demand for each week, including week 10, using

Explain optimum service level is what percent, In a single period model if ...

In a single period model if shortage cost is four times excess cost then the optimum service level is what percent?

Explain team meetings can be helpful, Team meetings can be helpful. Interor...

Team meetings can be helpful. Interorganizational conflict is conflict that arises across organizations. What are sources of conflict?

Explain successful entrepreneurial organizations, Successful Entrepreneuria...

Successful Entrepreneurial Organizations identify an entrepreneurial organization that has been successful for at least 10 years. What factors have contributed to the organization'

Define management practices increasing government regulation, How do you th...

How do you think management practices might change in response to increasing government regulation in the banking and health care industries?

How minimize the work-in-process inventory, The production manager must det...

The production manager must determine the processing sequence for 7 jobs through the grinding and debarring departments. The same sequence will be followed in both departments. The

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