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 skilled nursing care, A nursing home contracts with an HMO for skil...

A nursing home contracts with an HMO for skilled nursing care at $2.00 PMPM. If costs are expected to average $120 per day, what is the maximum utilization of days per 1,000 member

Need help for assignment, Prob: The 21st Century Studios is about to begin ...

Prob: The 21st Century Studios is about to begin the production of its most important (and most expensive) movie of the year accepted#

Process analysis, Process Analysis Process Analysis means the study of...

Process Analysis Process Analysis means the study of the overall process in factory (plant). It analyses every step of the manufacturing process and aims at improving the indu

Explain capacity planning involving hiring, Capacity planning involving hir...

Capacity planning involving hiring, layoffs, some new tooling, minor equipment purchases, and subcontracting is considered as which one of the following planning horizons?

Explain at what rate have sales been growing, Shalit Corporation's 2008 sal...

Shalit Corporation's 2008 sales were $7 million. Its 2003 sales were $3.5 million. At what rate have sales been growing? Round your answer to the nearest hundredth.

Compute a tracking signal or determine whether the forecast, The following ...

The following are monthly actual and forecast demand levels for May thur December for units of a products manufactured by the N. tamimi Pharmaceutical Company Month Actual deman

Discuss about the holding inventory control systems, Discuss about the Hold...

Discuss about the Holding Inventory Control Systems. Holding Inventory Control Systems: Holding great levels of inventory enables an organisation to be extra flexible to

Give example of probability encountered, identify at least one example of p...

identify at least one example of probability encountered in everyday life which has not previously been mentioned.

Explain disadvantages of free international trade, What are the benefits an...

What are the benefits and disadvantages of free international trade for the United States? Illustrate your answer with examples.

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

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