Acceptance tests of aircraft are done by the pilots sent by the owner, not the factory. They do some flying and follow a checklist which is again unique to the

Acceptance tests of aircraft are done by the pilots sent by the owner, not the factory. They do some flying and follow a checklist which is again unique to the company. It's like sending out your software for evaluation, which is in production and its evaluated by clients. You don't send testing/staging software for evaluation by clients.