The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.
—Stephen Hawking
An interesting issue that we face in IT projects is planning how long it will take to fix the bugs reported either after internal tests or user acceptance tests. Most managers, especially executives, on the client’s or supplier’s side expect a specific date (mostly related to a milestone) by which all identified issues will be fixed. They assume that the process of achieving a desired quality state
