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 the probable destiny competing products, Consider this: Lee Peterso...

Consider this: Lee Peterson has invented a new product that detects water leaks due to broken pipes and sends out an alarm similar to a smoke alarm. However, Lee has very little pe

Factors affecting scheduling - internal factors, Factors Affecting Scheduli...

Factors Affecting Scheduling - Internal Factors Internal Factors: These are the factors which are with in the control of the management. These factors should be manipulated in

Explain payoff table provides profits based on decision, The following payo...

The following payoff table provides profits based on various possible decision alternatives and various levels of demand at Amber Gardner's software firm: DEMAND Decision LOW

Explain main summary task and a summary task, What is the difference betwee...

What is the difference between a main summary task and a summary task?

Explain what is the long-term probability, A copy machine is always in one ...

A copy machine is always in one of two states, either working or broken. If it is working, there is a 70% chance that it will be working tomorrow. If it is broken, there is a 50% c

Quality control, power electronic buys 45ohm resistor, standard deviation f...

power electronic buys 45ohm resistor, standard deviation for this register is 4ohm.sample size of n=

Explain competitors can be inferred by demonstration, Security Services, In...

Security Services, Inc. and Redline Protectors were the two predominant providers of home alarm systems in the Dallas area. They had become the two big businesses after the smaller

Explain do you consider them effective, Using the IT Savvy four types of th...

Using the IT Savvy four types of the CIO (page 146 IT Savvy), choose a type for each of CIO or IT leaders for all of the cases we have reviewed in this class. Give example of why y

Explain what is an interim plan, Answer the following questions: 1) ...

Answer the following questions: 1) What is the difference between a task dependency and a task constraint? 2) Give a real-world situation when you might used the foll

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