Produce is where every prior decision either pays off or comes due.
The handoff to development is not the end of design. It's a continuation of it by other means. Being present in this phase — available, responsive, and willing to make calls quickly — is what separates a designer from someone who just makes pretty pictures.
Testing and QA is not a safety net. It's a final creative act. You're asking: does this thing do what we said it would do? Does it behave with integrity? Does it respect the person using it?
If the answer is yes: ship.
If the answer is no: fix it. There are no shortcuts here. The thing you ship is the thing people judge. Not the prototype. Not the deck. Not the vision document. The thing.
Done means tested. Shipped means accountable.