Clement Fezandié, Amazing Stories (1926)
“ But the efficiency expert who spends his time seeking to save one screw on a machine, or a button or a stitch on a garment is a menace to society. In making any machine, engineers allow for what is called the 'factor of safety.' They know that every machine at times will be called on to sustain undue strains or stresses, and they allow a margin of strength to meet these unusual demands. ”
