In class, when we teach discovery driven planning, we also show how you can use software tools to make the whole process easier.
For those of you who would like to experiment with the tools, they are available for downloading at the Triad Associates web-site. Among the tools are calculators for a mini-NPV analysis, software to do DDP analysis for new ventures as well as internal projects, a real options calculator and many more. Check it out and let me know how it goes.