Alex Osterwalder's business model framework now appears to have an electronic tool to support it.
I think the business model is a great first step in the requirements management or project scoping processes. I see that it helps clarify the top line expectations about how your solution is supposed to fit into the organisational context and align with it's goals.
You can read about the tool's development here.
Business Model Designer From Sticky Note To Screen Interaction Presentation - Get more Business Plans