I thought this week's assignment was interesting and meaningful. I could see as I worked through all of my screens that there sections that I had missed a few key elements in. Basically screens that would be required for the interactivity to work correctly but are essentially screens that facilitate getting from one part of the process to the end result. There are also a few places that even now will need some more work and consideration.
I've actually designed an app like this before, but I was given the task as a graphic designer and I was told the pages that it would have. In that case, there were similar issues that presented themselves. I think to some degree these types of things are a part of the nature of the process.