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 ethnocentric, Select an MNE with which you are familiar and determi...

Select an MNE with which you are familiar and determine which staffing approach (ethnocentric, polycentric, geocentric, or regiocentric) would be most beneficial to that enterprise

Determine the economic production quantity, Water Wheelies manufactures hig...

Water Wheelies manufactures high-pressure sprinkler heads. These are produced periodically at a rate of 20,000 per month. Demand is steady at 15,000 per month. Each production run

Explain all the principles of organization, Explain all the principles of o...

Explain all the principles of organization. Principles of Organization: Organization is a structure or mechanism which enables living things to work efficiently together.

Describe the preliminary data collection methods, Q1. Explain the prelimina...

Q1. Explain the preliminary data collection methods Q2. Complete the Kerzner Office Equipment case study at the end of Chapter 11 in Project Management: The Managerial Process.

Explain employment eligibility, Prospective employers can conduct a credit ...

Prospective employers can conduct a credit check along with a background check to determine employment eligibility. Do you feel this is good business practice or an invasion of pri

Compute the expected weeks of supply, The owner of Genuine Reproductions (G...

The owner of Genuine Reproductions (GR), a company that manufactures reproduction furniture, is interested in measuring inventory effectiveness. Last year the cost of goods sold at

Explain homogenous group, In a diverse team, a "fault-line" refers to: a. C...

In a diverse team, a "fault-line" refers to: a. Cases in which a team tends to find fault or blame in the other team members rather than their own behaviour b. Cases in which group

Explain why is forecasting important for an organization, Why is forecastin...

Why is forecasting important for an organization? Which company do you believe to be successful at forecasting and why?

Explain does veil of ignorance concept make sense, Some ethical philosopher...

Some ethical philosophers are deep thinkers. In the area of distributive justice, the concept of ‘Veil of Ignorance' by John Rawls is not an easy concept to understand. In your own

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