the finished article
Someone or something who has arrived at a point or state of completion or readiness. It's clear that the team's new coach has a ways to go before being the finished article, but his freshman season at the helm has shown a lot of potential and an eagerness to try new things with the players. We're still in the planning stages of the project, so it will be at least until the end of the year before we have the finished article ready for consumers.
the finished article
something that is complete and ready for use.