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 negotiable instrument, Nan read the note that Tom had just given he...

Nan read the note that Tom had just given her. She was doing some home repair for Tom. The note represented the $10,000 that Nan and Tom agreed upon for all of the work. The note r

Explain flexible manufacturing system, Meile Machine Shop, Inc., has a 1-ye...

Meile Machine Shop, Inc., has a 1-year contract for the production of 225,000 gear housings for a new off-road vehicle. Owner Larry Meile hopes the contract will be extended and th

Explain avoiding a risk and accepting a risk, Differentiate between avoidin...

Differentiate between avoiding a risk and accepting a risk. Indicate the implications to your project that each might have.

Explain low customer contact and are capital intensive, What are companies ...

What are companies that have low customer contact and are capital intensive; yet provide a service, called?

Business ethics and corporate social responsibility, Explain the relationsh...

Explain the relationship among 'Business Ethics' and 'Corporate Social Responsibility' Ethics may be viewed as a set of moral principles that guide behaviour, based on what is

Electronic data interchange, Electronic data interchange relies on   St...

Electronic data interchange relies on   Structured data and standard business documents.

What factors would you consider in promotions distribution c, As the Market...

As the Marketing Manager for Proctor and Gambles Pet Nutrition and Care division you have been asked to consider launching a new dog food product in Mexico. What factors would you

Decision making process for ethical solution, Profits have been decreasing ...

Profits have been decreasing and power plant executives are considering whether to use a production process that decreases costs (and therefore increases profits) but adds to the p

Scheduling - aggregate planning, Scheduling - Aggregate Planning Mean...

Scheduling - Aggregate Planning Meaning and Definition Scheduling may be defined as the assignment of work to the facility with the specification of times ,and the sequence

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