How much will the team have to learn as individuals and as a team? How many components can you enumerate and in what detail? How many tries will each component

How much will the team have to learn as individuals and as a team? How many components can you enumerate and in what detail? How many tries will each component take? How many interconnects to "external" systems are there? Risk is time, how much risk is there? What are the non-functional requirements? These will be dropped when time is short. How motivated will your team be? What will make them depressed about this project? What will de-motivate them? ===== Don't ask a developer for estimates in terms of time. It's not useful to them, and it's not informative to management.