timelets

Our foundry used to be much like other foundries. When we cast the first “Model T” cylinders in 1910, everything in the place was done by hand; shovels and wheelbarrows abounded. The work was then either skilled or unskilled; we had moulders and we had labourers.

Now we have about five per cent. of thoroughly skilled moulders and core setters, but the remaining 95 per cent. are unskilled, or to put it more accurately, must be skilled in exactly one operation which the most stupid man can learn within two days. The moulding is all done by machinery.

--- Henry Ford, My Life and Work.

As a result of this knowledge environment, most of How To books are written "for dummies."