Someone asks us to find a URL for them on a specific topic and I give them search engines instead of doing the research for them, but that makes me a jerk? Yet, giving them the title of a book to read even comes close to answering the question? I think not! It took longer for them to type the question here at TR than it would have for them to do their own research.
Had they asked a specific question which related to the topic, we might have been able to explain it to them in layman terms. But, asking us to provide a URL to define the concept for them is no different than asking us to do their homework for them.
It took me all of 10 seconds to go to www.ask.com and type in "What is a critical path?", which returned [b]10 PAGES[/b] of results at 12 per page, and one of them listed on the first page is the definition of the term "critical path" at WIKI, which in turn leads you to the definition of "critical path method", also listed on the first page of search results.
http://en.wikipedia.org/wiki/Critical_path_method
THAT is a SIMPLE URL leading to a definition which even I can understand. This link also lists 7 books to read, 7 links to related topics and 2 links to analytical/calculator tools which will ALSO do their job for them.
There, better?