Suggestions made by the Value Analysis group will increase costs and reduce capabilities. Original drawings will be mangled by the copying machine. In any given miscalculation, the fault will never be placed if more than one person is involved. Any error that can creep in, will. It will be in the direction that will do the most damage to the calculation.
All constants are variables.
In any given computation, the figure that is most obviously correct will be the source of error. A decimal will always be misplaced. In a complex calculation, one factor from the numerator will always move into the denominator. Prototyping And Production IV.1. Any wire cut to length will be too short.