A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools.
A chair is a very difficult object. A skyscraper is almost easier. That is why Chippendale is famous.
You can design and create, and build the most wonderful place in the world. But it takes people to make the dream a reality.
Successful design is not the achievement of perfection but the minimization and accommodation of imperfection.
I have an all-Japanese design team, and none of them speak English. So it's often funny and surprising how my ideas end up lost in translation.
Good design is making something intelligible and memorable. Great design is making something memorable and meaningful.
Almost all quality improvement comes via simplification of design, manufacturing... layout, processes, and procedures.
If you don't design your own life plan, chances are you'll fall into someone else's plan. And guess what they have planned for you? Not much.