See post #54 of:I remember a piece that said the line would initially start at 1 shift - 350 units / shift and build up to 500 units / shift, at which point they would split the force and go to two shifts - 350 units / shift (or 700 units per day) and build up to 500 units / shift (or 1000 units per day) and a five day week. That's where the 250,000 per year came from. They also had the length of time for production build ups but that's the part I can't remember.
http://elioowners.com/threads/invitation-only-event-la-area.6212/page-6
What I did not ask Paul Elio is how many units would actually be produced during this time.. The purpose of this "phase" is to get the speed up to 1000 per day. The production line would be stopped and started to make changes in order to get the line speed up to maximum. However the output would be less due to the line stopping and starting.
I had always assumed the 45 and 90 days referred to calendar days, not working days, though I did not confirm that.