The Design Sprint aka Google Design Sprint is speeding up innovation. Instead of talking about what could be, we build and test what actually works. But it is not that easy.

Testing and falsification is a fine skill. Be aware not to trap yourself in your own bias. This is not a self-fulfilling prophecy. It is a highly disciplined approach.

Following the book, it takes five days. Can be done in three days. But, as always, it depends on the circumstances.