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

Explain customer spend at the service desk, Sharp Discounts Wholesale Club ...

Sharp Discounts Wholesale Club has two service desks, one at each entrance of the store. Customers arrive at each service desk at an average of one every six minutes. Sharp Discoun

Explain the four steps of the feedback control model, Identify and briefly ...

Identify and briefly describe the four steps of the feedback control model

Explain sow contains words such as nearly or approximately, If the customer...

If the customers SOW contains words such as nearly or approximately, then: Answer The project manager uses his discretion in determining the meaning The sponsor uses his d

Turnround at the preston plant, what are the most significant events in the...

what are the most significant events in the story of how the plant survived because of its adoption of quality based principles

Explain process as it relates to risk management, We have now covered the s...

We have now covered the steps of the Active Threat and Opportunity Management (ATOM) process. What is your opinion of the process as it relates to risk management? What are its ben

Explain principles of relating to customers and co-workers, It is your firs...

It is your first day at ABC Computer Repair and a very angry customer walks into the shop. They instantly start yelling at you and telling you that one of the techs did not do a go

How technology is changing the customer service, How technology is changing...

How technology is changing the customer service and service offerings?

Explain levels of management, Explain levels of management. Levels o...

Explain levels of management. Levels of Management: Industrial management has got the given activity levels: 1)  Top Management : this includes Board of Directors, Ma

Product /management, Define Product Management,functions of Product managem...

Define Product Management,functions of Product management

Describe the similarities and differences among, Discuss the similarities a...

Discuss the similarities and differences among the organization, group, and job levels in open systems theory.

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