AltumAngel Posted July 6, 2008 Posted July 6, 2008 Law #1: In any calculation, any error which can creep in will do so. Law #2: Any error in any calculation will be in the direction of most harm. Law #3: In any formula, constants (especially those obtained from engineering handbooks) are to be treated as variables. Law #4: The best approximation of service conditions in the laboratory will not begin to meet those conditions encountered in actual service. Law #5: The most vital dimension on any plan drawing stands the most chance of being omitted. Law #6: If only one bid can be secured on any project, the price will be unreasonable. Law #7: If a test installation functions perfectly, all subsequent production units will malfunction. Law #8: All delivery promises must be multiplied by a factor of 2.0. Law #9: Major changes in construction will always be requested after fabrication is nearly complete. Law #10: Parts that positively cannot be assembled in improper order will be. Law #11: Interchangeable parts won't. Law #12: Manufacturer's specifications of performance should be multiplied by a factor of 0.5. Law #13: Salespeople's claims for performance should be multiplied by a factor of 0.25. Law #14: Installation and Operating Instructions shipped with the device will be promptly discarded by the Receiving Department. Law #15: Any device requiring service or adjustment will be the least accessible. Law #16: Service conditions as given on specifications will be exceeded. Law #17: If more than one person is responsible for a miscalculation, no one will be at fault. Law #18: Identical units which test in an identical fashion will not behave in an identical fashion in the field. Law #19: If, in engineering practice, a safety factor is sent through the service experience at an ultimate value, an ingenious idiot will promptly calculate a method to exceed said safety factor. Law #20: Warranty and guarantee clauses are voided by payment of the invoice. Law #21: The rule for engineers: "Change the data to fit the curve."
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