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defect (bug)
subject			fact

defect	is a synonym of bug
	has definition A flaw in any aspect of the system including the requirements, the design or the code, that contributes, or may potentially contribute, to the occurrence of one or more failures
	has example the absence of code to handle an exception
	is a subtopic of 10.1 - Basic Definitions
	is a kind of problem
problem	has solution which will normally entail developing software, although you may decide that it is better to purchase software or to develop a non-software solution
	should be written as a simple problem statement in one or two sentences

Kinds of defect :

• defect in a numerical algorithm (5 kinds, 2 facts)
• defect in an ordinary algorithm (9 kinds, 2 facts)
• defect in handling stress and unusual situations (4 kinds, 5 facts)
• documentation defect (4 facts) - A defect in a user manual, reference manual or on-line help that gives incorrect information or fails to give information relevant to a problem
• hung system (5 facts) - A system that appears to the user to not be doing anything, caused by such things as a crash, a deadlock, a livelock or an infinite loop
• timing and co-ordination defect (1 kind, 4 facts)