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 simple to state and very difficult to execute, The Assignment is at...

The Assignment is at the same time very simple to state and very difficult to execute. It is designed to allow you to use all the tools of strategy and analysis that you have learn

Vertically integrated or virtual organisation, Vertically Integrated or Vir...

Vertically Integrated or Virtual Organisation An organisation might decide not to source goods or services externally but to own the supplier company itself. For instance a

Explain what are these other agency relationships, As a top executive, the ...

As a top executive, the only agency relationship I am concerned about is the one between myself and the firms owners. I think that it would be a waste of my time and energy to worr

Activities relating to analysis and control of activities, Activities relat...

Activities relating to analysis and Control of Activities The next problem after the designing of the production system is the analysis and control of the production system. It

What is the average number of customer waiting, Andrew the barber owns a fo...

Andrew the barber owns a four chai shop. Andrew estimated that each barber would take an average of 30 min to give a haircut in an exponentially distribution fashion. Customers arr

Describe double exponential smoothing, The Cardinal Electronics Company mus...

The Cardinal Electronics Company must project the sales of cellular phones for the next year (called year 2). The number of cell phones sold by Cardinal Electronics in each of the

Factors for plant location choice - proximity to market, Factors for plant ...

Factors for plant Location choice - Proximity to Market Organization s may choose to locate facilities close to their market, not merely to minimize transportation costs, but

Explain what makes one campaign better than the other, Suppose that a small...

Suppose that a small publisher selling to book distributors has fixed operating costs of $600,000 each year and variable costs of $3.00 per book. How many books must the firm sell

How meet small towns daily requirement, Determine how to minimize the numbe...

Determine how to minimize the number needed to meet small towns daily requirement

Explain agreed based on prisoner''s privacy concerns, 1. In Everson v. Mich...

1. In Everson v. Michigan Department of Corrections, the defendant claimed that hiring only female Corrections and Residential Housing Unit Officers was justified as a BFOQ. The co

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