This step occurs when all of your blind-testing results have come back and have been integrated into the manuscript. Somebody else should now take over the manuscript and edit it. This also means trying to play the game with all of your final corrections and changes and generally attempting to smoke out as many gremlins as possible. If you are going to publish the game, this is the production step. This is where many things can go wrong.
Rules have to be typeset and things can get scrambled about.
The art work has to be prepared from your prototype and things can get changed again. There is much potential danger in this phase of game design. This step is also extremely critical if you are going to design any more games. This is the feedback step where you must systematically collect feedback from those who play your game to see where you went right and where you went wrong. These steps are used for the publication of historical games.