Start-to-start

Start to Start: Step 1 is Order software license. As soon as the order is placed the vendor automatically grants us the legal right to use the software for production, not just evaluation. So we don't have to wait for the order to be completed. We can start Step 2, Create program using this software, immediately.

Start to finish: We can legally use the evaluation copy of the software to code programs, but we can't put them into production until we have placed the order. We expect Step 2 to occur much later than Step 1. But if we unexpectedly have the ability to start Step 2 earlier than schedule, we can. But we cannot legally FINISH Step 2 until we have STARTED Step 1.

I wasn't sure which question you were asking, so I answered both. Do I get double credit? ^_^