A part of succesfully managing changes (which keeps costs down) is documenting the requests and making estimates on how much the proposed changes will cost in terms of dollars and time. Prioritizing those changes, and deciding if they actually contribute to the success of the project (which can be a political situation) will help keep you on target. So, in the end, you might have the data that Jakob needs...
We need:Personally, I can't wait to see what sort of results come from this study. I've seen change processes devolve into a stream of conciousness that resulted in huge costs and missed deadlines.
> screenshot(s) of the "before" design
> screenshot(s) of "after"
> why the change was made
> the before vs. after numbers