Q) Define special cause and common cause variation

Q) Define special cause and common cause variation. Why is it important to distinguish between the two types of variation? In reference to improvement efforts how
would you approach the control of both types of variation?

Provide an example or real life situation
2 references
proper grammar
put most in your own words
cite what is not your own words
Make sure what you write relates to the topic
Go to google books on line for this book””””””””””‘Advance Performance Improvement in Health care Principles and Methods by Donald E. Lighter.