Henry Ford

If a device would save in time just 10 per cent or increase results 10 per cent, then its absence is always a 10 per cent tax. If the time of a person is worth fifty cents an hour, a 10 per cent saving is worth five cents an hour. If the owner of a skyscraper could increase his income 10 per cent, he would willingly pay half the increase just to know how. The reason why he owns a skyscraper is that science has proved that certain materials, used in a given way, can save space and increase rental incomes. A building thirty stories high needs no more ground space than one five stories high. Getting along with the old-style architecture costs the five-story man the income of twenty-five floors. Save ten steps a day for each of twelve thousand employees and you will have saved fifty miles of wasted motion and misspent energy.