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 terminals and arrive at a message concentrator, Messages are transm...

Messages are transmitted from low speed terminals and arrive at a message concentrator at a Poisson rate of 600/hr. They are held in a buffer until a hi-speed trunk line is free to

Explain cellular production is often conducted in a u-shaped, Cellular prod...

Cellular production is often conducted in a U-shaped (horseshoe-shaped) cell, rather than the rectangular cells shown in Figure 2.7b. What might be the advantages of this U shape?

How library to research and analyze markets and competitors, E-commerce is ...

E-commerce is the trend that most companies are going toward now a days. You are to select one business that does not already employ e-commerce and develop an Internet strategy for

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.

Are operations and change strategy linked, 1.  Are operations and change st...

1.  Are operations and change strategy linked?  Answer: Yes operations strategy must be implemented and again this process presents choices that must be considered. The implemen

Decribe an examination-taking work plan, 1 Page maximum for the whole quest...

1 Page maximum for the whole question] : College students are "invincible". They study on the floor, spread their materials on the floor and lean over to access them, slouch in a c

Calculate annual breakeven number of meals, The restaurant would serve dinn...

The restaurant would serve dinner Tuesday through Saturday. Brian has noticed a restaurant for lease. The restaurant has seven tables, each of which can seat four. Tables can be mo

Explain what are some of the positive and negative impacts, What are some o...

What are some of the positive and negative impacts of federally mandated socioeconomic programs, goals, and quotas within the federal government contracting process?

Describe what is the basic problem causing this conflict, You are the plant...

You are the plant manager at Acme Plastics. You are running two shifts, a day shift and an evening shift. Before the day shift leaves each day, the workers must get an adequate sup

Explain if overachievement is acceptable, If overachievement is acceptable,...

If overachievement is acceptable, the appropriate di+ variable can be dropped from the objective function.

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