Isolate the Problem
A main principle of debugging is "divide and conquer." It's impossible to address problems when their domain is the entire system. Certainly, you need to be able to take a global view at times, but you will seldom if ever find a system that is totally messed up. If you do find such a system, the best recommendation is usually to scrap it and start over. In most systems, the problems will most likely be restricted to one program or one function or one functional error. Until you can narrow down your search, you'll be searching for the proverbial needle in a haystack.
One time when you need to be able to take an overall or global view of the system is when you are trying to visualize the logical layout of your system. You have ...
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