as a supplement to, not a substitute for,

the thought processes

as an initial step in debugging

when all other methods fail

for debugging process automation

Find the source of the error.

Try to deny the error

Fix the error (just that one).

Reproduce the problem reliably.

Fix the symptom

Test the fix

Debugging usually is performed under a pressure

Debugging always require a lot of time and efforts

Debugging confirms that programmers

are not perfect

Debugging does not require any intellectual efforts