Quality is not a factor you control

I'm not the inventor of this "quality triangle" - but after giving it some thought as to what my most valuable lesson has been as a project manager so far, it must be something that I actually learned while still programming: Quality is not a factor you control, thus

The quality conundrum !

It's simple and can explain a LOT of things to non tech. people and the like, when it comes to projects in the Internet business.