If the purpose is for colloquial reference, say in a meeting, I've heard sayings like "installation ready", "customer ready", or "programming ready". More generically, "Foo ready" implies that all steps needed to get to step foo have been completed and Foo can commence.
If this is for a production process then the only safe procedure is to have a paper or electronic work order attached to that serial number and a work culture that sticks to it. A good shop order process and a tight chain of custody between work cells should be the only proof that it's ready for an installation or shipment. No amount of stickers, ambiguous names, or labeled buckets will replace the history and pedigree provided by a work order with testing results, rework orders, and QA sign-offs attached to the back.