- By now you should have a product require- ment document. Refer
to it often: What it is you are building, exactly? Discipline
yourself to use this guide. If your product starts to change
radically, that's fine but that might mean a trip back to the
Explore phase.
- It's all process right now: Iterate, learn, im- prove, learn,
optimize, and learn.
- When you finish your first prototype, start working on your
second, and third. Think in terms of success metrics: It's not how
many prototypes, but what is the bar for the final one? And before
that: What is the bar right now, for the next build?
- Test for manufacturability. A good rule of thumb: By the time
you reach your 3rd prototype, you should be starting to verify that
it is actually buildable.