It depends on the project, what's happening that day on the project, at what stage were in on the project; it various from project to project and where we're needed.

Screening is an invaluable part of the process, obviously, having test screening and you definitely learn something.

Well, truth be told it was the hope on the last one, it's always the hope. It's just you don't just wasn't to do it- everything we do is, for a lack of a more crass term, everything we do is pushing against the conveyer belt.

Then we started looking at story and what was making sense and what wasn't making sense, emotionally and thematically the intention that we had a year earlier when they were working on the script, did all that come across? It's all kind of generic things, but it's fascinating and it's weird - I haven't made that many films, but it's weird that every time you think you learn from your mistakes on your last film you have a slew of new mistakes and things that you learn.

And more importantly what we found with those people is that a lot of them said, "Hey it's not what I thought it was going to be." Which is a great reaction, particularly if they liked it.

It was really important to try to reach a whole new audience so we had a lot of people in who not only had not seen the last film but were not Star Trek fans, or thought of themselves as not being Star Trek fans, or they had seen bits and pieces of Star Trek in the past and it was just not for them.

And then simultaneously I don't think they're asking you to necessarily write in stone that this is what you're going to do or what you have to do.