Older blog entries for robocoder (starting at number 0)

30 Nov 2002 (updated 27 Dec 2002 at 21:21 UTC) »

We, humans, are notoriously imprecise. Do you always agree with what someone else calls an anomaly, a bug, a defect, a deficiency, an error, an exception, a fault, a problem, or an issue? When was the last time you matter-of-factly said:

  • That's not a bug.
  • That's a "feature".
  • That'll be an enhancement (or change request).
  • We need to reset the customer's expectations.

That a reported problem may meet with any (or all) of these responses, leads us to consider the need for more concise operational definitions. I originally explored that here, and formalized into into an e-paper, "What is a bug?"

And after considerable literature review, analysis, and refinement of my thoughts, I arrived at the following definitions:

bug
any deviation between the customer's expectation, the specification, and/or implementation.
error
any observed event or detected deviation between the specification and the implementation.
defect
a deviation between the specification and the implementation, detected after release to the customer.
Maybe now I can get a normal night's sleep.

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