Guidelines -- Check obvious
	2. Check for the “obvious” problems o Verify that the inputs are as required -- case, syntax, etc. ; Are there 0-O 1-l I-l or other substitution mistakes o If there are multiple components or files in the buggy system, establish that these are properly “connected” o Has anything been changed recently o When there are multiple inputs, does the order matter o In programming, are all variables ... ; Declared ; Initialized
			The chances that the problem is something “obvious” are small because if it were so “obvious” you would have already found the problem … but you must check