Sensitivity and solution space

Hi abha and welcome to the forum,

My answer to understand new stuff is to read many different authors. Sometimes the book the prof uses makes no sense but some web page is perfect for your brain. Try these three sites:
First with an example:
http://people.brunel.ac.uk/~mastjjb/...ns_solver.html
Second a pdf file that says this is complicated when dealing with the real world
http://www.econ.ucsd.edu/~jsobel/172aw02/notes7.pdf
Third a web page
http://www.quickmba.com/ops/lp/