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

State the term shamrock organisation, State the term Shamrock Organisation?...

State the term Shamrock Organisation? Shamrock Organisation: According to Charles Handy the 'Shamrock Organisation' used to apply a model to the workforce flexibility. Th

Ethics, An airplane manufacturer has spent a great deal of money developing...

An airplane manufacturer has spent a great deal of money developing a new airplane. The company badly needs cash because it is financially overextended. If it does not get large or

How to compare forecasts with the original data, Develop a forecast for yea...

Develop a forecast for years 2 through 12 using exponential smoothing with ƒÑƒn= .4 and a forecast for year 1 of 6. Plot your new forecast on a graph with the actual data and the n

Explain primarily used to help design products, Which of the following is p...

Which of the following is primarily used to help design products that will connect product attributes with customer desires?

Explain what are the upper and lower control chart limits, The defect rate ...

The defect rate for a product has historically been about 2.4%. What are the upper and lower control chart limits for a p-chart, if you wish to use a sample size of 100 and 3-sigma

Problem 8, a small assembly line for the assembly of power steering pumps n...

a small assembly line for the assembly of power steering pumps needs to be balanced. exhibit 8.11 is the precedence diagram. the cycle time is determined to be 1.5 minutes. how wou

Explain investment spending sharply declined in the us, In early 2001, inve...

In early 2001, investment spending sharply declined in the U.S.. In the two months following the Sept. 11, 2001 attacks on the U.S., consumption also declined. Use AD-AS analysis t

Economic order quantity, The Warehouse Company supplies spare parts for its...

The Warehouse Company supplies spare parts for its two plants, Plant A and PlantB. Plant A and Plant B do not have any significant storage space. Hence you want carryminimum possib

Persuasion - types of managerial tactic, Persuasion - Types of Managerial T...

Persuasion - Types of Managerial Tactic The manager assigns the development of ideas to experts, possibly external consultants or internal technical staff who in turn project

Explain what purpose does the project charter serve, a. What purpose does t...

a. What purpose does the Project Charter serve? b. What are the main components or sections of the Project Charter? c. What purpose does the Project Definition Document serve

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