Fast! Fast. Fast?

I believe¹ it was Kent Beck who coined the following statement:

Make it work, make it right, make it fast.

An easy way to memorise this:

1. Fast! - make it work
2. Fast. - make it right
3. Fast? - make it fast

In other words:

1. Fast! - build it quickly
2. Fast. - tidy it up
3. Fast? - make it performant, if needed

Guess what stage this article is in?