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 fedex manufacturing process, Describe FedEx manufacturing process a...

Describe FedEx manufacturing process and scheduling approach

Plant layout, A plant layout should be designed in such a manner that ...

A plant layout should be designed in such a manner that it will provide safety and security of employees at all costs. Optimum plant layout calls for high operating e

Explain indifferent between machines a and c, At a decision point in a deci...

At a decision point in a decision tree, which machine would you select when trying to maximize payoff when the anticipated benefit of selecting machine A is $45,000 with a probabil

Explain impact an organizations ability to compete, Why are aggregate and s...

Why are aggregate and succession planning of critical importance? How might failures in these areas impact an organizations ability to compete? Be specific

Explain the e-activity, "Big Box" Please respond to the following: •From th...

"Big Box" Please respond to the following: •From the video, determine if it is the responsibility of an organization to pay its workers a "living wage." Explain your rationale. •Fr

What are the advantages of using single sourcing strategies, What are the a...

What are the advantages of using single sourcing strategies? Advantages of using Single sourcing: a. Simple to keep relations along with only one supplier b. Simple to

Which coca-cola products are main likely to lose customers, Some industry a...

Some industry analysts think soft-drink companies should develop products that will bring new customers into the market rather than just creating variants on the old. They warn tha

Method describe how much one person is on a given dimension, Which statemen...

Which statement about comparative of performance appraisal is false/1. it is a method that seek to identify one relative standing among those being rated/2.this method indicate tha

Explain disadvantages of financing via the internet, What are the advantage...

What are the advantages and disadvantages of financing via the internet?

Explain responsibility and immediately begin clean-up, MKD Transportation o...

MKD Transportation owns and operates a fleet of container ships and tankers that transport goods around the globe. Company executives have just been contacted by the media with a c

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