Common or random causes - causes of variability, Operation Management

Assignment Help:

Common or Random Causes - Causes of Variability

Consider throwing a pair of dice. The possible outcomes range from 2 to 12, but with different probabilities of occurrence (see figure below). Over a long series of throws, '2' would result in about 3 per cent (1/36) of the throws, and '7' would result in about 17 per cent (6/36) of them. However, the result of a particular throw is unpredictable. It will be determined by a number of variables which interact in a manner of which we have no detailed knowledge at the time of the throw e.g. the trajectories of the dice as they leave the hand, the microscopic contours of the surfaces of the dice and landing surface, the mechanical properties of the surfaces at the points of contact, etc. Such variables are called common causes.

2073_Common or random causes - causes of variability.png

When, in the long run, the outputs of a process can be expressed in probabilistic terms, the process is described as a common cause system. Manufacturing processes are typically common cause systems. That is, even when great care is taken in the set up and control of the process, variability of the output occurs. This variability cannot be reduced unless the process is changed. Statistical methods provide a means of registering common-cause variations and distinguishing them from the second type, assignable causes.


Related Discussions:- Common or random causes - causes of variability

Describe corruption and bribery, Corruption and bribery are common in some ...

Corruption and bribery are common in some countries. Would you simply avoid locating in such a country, or locate there and deal with it? If the latter, how would you deal with it?

Differentiation scheme that focuses on quality products, XYZ's Inc. Schedul...

XYZ's Inc. Scheduling System Started in Jacksonville, Indiana in 1983 at Mick's Lounge, where Papa John, John Schnatter, started a pizza delivery business within his father'

Explain product management offers a host of dilemmas, Product management of...

Product management offers a host of dilemmas and challenges to marketers. What products will give us a competitive advantage? Are the new products we are considering in keeping wit

Explain what is the break-even point for this operation, A product is curre...

A product is currently made in a job shop, where fixed costs are $4,500 per year and variable cost is $10 per unit. The firm sells the product for $70 per unit. What is the break-e

Explain several organizational communication problems, Do some research to ...

Do some research to identify four to six common communication problems that occur in organizations? The text discusses several organizational communication problems. Provide exampl

Explain test market prior to an advertising campaign, A research team condu...

A research team conducted a study of soft- drink preferences among residents in a test market prior to an advertising campaign for a new cola product. Of the participants, 130 are

Memorandum, location analysis on expanding manufacturing plant

location analysis on expanding manufacturing plant

Briefly explain two arguments raised in the text, Briefly state two argumen...

Briefly state two arguments raised in the text for and against tort reform

Find the net present value, The company is considering a capital expenditur...

The company is considering a capital expenditure of $480,000. It has an estimated life of 4 years and no salvage value. The estimated net income and new cash flow from the project

Explain employees effectively execute the strategy, Select a company that y...

Select a company that you believe uses its employees to achieve a competitive advantage. Discuss how the employees effectively execute the strategy and how the company can sustain

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