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 what are the boundary points of the feasible region, Maxwell Manufa...

Maxwell Manufacturing makes two models of felt tip marking pens. Requirements for each lot of pens are given below. Fliptop Model Tiptop Model Available Plastic 3 4

Calculate the total cost of ordering and carrying clay pots, 1. Garden Vari...

1. Garden Variety Flower Shop uses 1000 clay pots a month. The pots are purchased at $3 each. Annual carrying costs per pot are estimated to be 25% of cost, and ordering costs are

Explain internet for marketing communications, How you Google's do expected...

How you Google's do expected dominance of the online display advertising market will affect marketers who already use the Internet for marketing communications? Will its push into

Explain receive advice from immediate supervisor, What are some of the poss...

What are some of the possible reasons Scott did not seek or receive advice from her immediate supervisor?

Explain what are the pros and cons of the control system, What kind of cont...

What kind of control systems are being used to measure the performance of hospitals and their different kinds of employees such as doctors and nurses? What are the pros and cons

Define what are the steps and the benefits of a social audit, What are the ...

What are the steps and the benefits of a social audit?

How to implement new hr strategic objectives, Identify and describe a curre...

Identify and describe a current situation, within your current or former organization, where the challenges of the process of change, due to a competitive global environment, has

Explain what is the time between orders, Hottenstein, Griffith, and Hult, a...

Hottenstein, Griffith, and Hult, attorneys at law, do a great deal of printing. The firm uses a single type of printer with annual demand for print cartridges of 480 per year. The

Explain private employees to prevent drug, Should urine testing, or other t...

Should urine testing, or other types of testing, be permitted among public and private employees to prevent drug and alcohol abuse? why or why not?

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