Like other project activities, test planning and test design are themselves subject to errors and omissions.
Therefore the major test documents should be independently reviewed before testing. The formality of
such a review will vary as the risk; in any event it is essential that someone, other than the author of a
test specification, examine it for adequacy, feasibility, and traceability.
4.2 Laws
There is no such thing as a scientific law. All scientific ???laws??? are in fact useful rules of thumb which
have (mostly) not yet been disproved. Boyle??™s law for example has been shown to be false (at certain
temperature extremes). Boyle??™s law is however very useful as a way of understanding the relationship
between temperature and pressure. Murphy??™s law states that
if it can be done wrongly someone will do it
wrongly
(there are lots of variations on this but Capt. Murphy, U.S. Army, had seen too many recruits
throwing a hand grenade pin really well to have any doubt about his definition). The following ???law??? is
offered in the hope it??™ll be useful, if not 100% accurate:
Farrell-Vinay??™s law:
if it can go wrong it will not go wrong until the last opportunity to fix it has passed.
Thus only when it??™s released will the major news agency discover that its Word processor ???eats??? text in
a ???Pacman???-like manner.
The importance of this law lies primarily in the way it saps your confidence that you have tested
thoroughly, and spurs you to greater efforts.
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