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Murphy’s Law

As you would undoubtedly expect of a world-class consultancy, Crew Green Consulting is extremely familiar with Murphy’s Law and its ramifications. The following statements of the Law are believed to have originated at RCA in the 1950s and remain entirely valid today.

  • An electronic circuit designed to protect a unit from catastrophic failure will not.
  • A circuit element specifically designed to be highly reliable will not be.
  • Any electronic design must contain at least one part which is obsolete, two which are unobtainable and three which are still under development.
  • If x is the amount of time you wait to touch a hot vacuum tube, the time for the tube to be cool enough to touch is always greater than x.
  • An expert is one who knows more and more about less and less until he knows absolutely everything about nothing.
  • A complex system that works is invariably found to have evolved from a simple system that works.
  • Logic is a systematic method of coming to the wrong conclusion with confidence.
  • Any component removed, tested and found good has an extraordinarily high chance of breaking in the re-installation process.
  • If you build a system that even a fool can use, only a fool will want to use it.
  • First draw your curves, then plot your readings.
  • Do not believe in miracles. Rely on them.
  • Firmness of delivery dates is inversely proportional to the tightness of schedule.
  • Dimensions in data sheets will always be expressed in the least usable term. For example, velocity will be expressed in furlongs per fortnight.
  • Any wire cut to length will be too short.
  • Tolerances will accumulate unidirectionally toward maximum difficulty of assembly.
  • A fail-safe circuit will operate so as to destroy others. Its main mode of operation will be unforeseen and unforeseeable.
  • A transistor protected by a fast-acting fuse will protect the fuse by blowing first.
  • Only after completely disassembling the unit will you realize the reason it wasn't working was because it wasn't plugged in.
  • Any error in calculation will be in the direction of most harm.
  • In specifications, Murphy's Law supersedes Ohm's Law.
  • If a safety factor is set through service experience at an ultimate value, an ingenious idiot will promptly calculate a method to exceed the safety factor.
  • Given any problem containing n equations, there will always be n+1 unknowns.
  • Any sufficiently advanced technology is indistinguishable from magic.
  • If the number of screws which must be removed when disassembling a given electronic device is represented by x, the number of screws used when reassembling it will be some number less than x.