Holes in pen lids were introduced to prevent suffocation regardless how far down the airway the lid may be lodged.
In Amsterdam, the tiles under Shipol's urinals would pass inspection for cleanliness. Nobody might notice it. What is noticed, that each urinal has a fly in it. If you look harder the fly turns into a black outline of a fly etched into the porcelain. It improves the aim! If a man sees the fly he aims at it!
Fly-in-urinals research found that etchings reduce spillage by 80%. Does this give you something to think about? It is the perfect example of process control.
Enjoy a nice week.