EMBA的小眼睛

What's it for?

and How will we know if it worked?

Answer these two questions first, please. If it's worth doing, it's worth knowing before you do it.

A hammer is for getting nails into wood, and it's pretty easy to tell if it does the job well. That's one reason why we have so many good hammers available to us--real clarity about what it's for, and whether it works or not.

Too often, we wait until we see what something does before we decide what we built it for.