I disagree. Developers, like me, tend to build the entire thing before the customer validation. This is so wrong if you go the lean approach. Excellent blog po

I disagree. Developers, like me, tend to build the entire thing before the customer validation. This is so wrong if you go the lean approach. Excellent blog posts about this issue: "Why only fools write code first" http://blog.reemer.com/why-only-fools-write-code-first http://blog.reemer.com/why-only-fools-write-code-first