during the what phase of a problem solving, means-ends analysis is a very common heuristc.

Answer 1

Not sure, so I searched Google under the key words "problem solving means-ends analysis" to get these possible sources:

http://www.google.com/search?client=safari&rls=en&q=problem+solving+means-ends+analysis&ie=UTF-8&oe=UTF-8

In the future, you can find the information you desire more quickly, if you use appropriate key words to do your own search. Also see http://hanlib.sou.edu/searchtools/.