I agree with the sentiment of JFDI Britain, however it depends how you "JFDI" ... if you can bootstrap and do it all yourself, then fine, JFDI. However if you w

I agree with the sentiment of JFDI Britain, however it depends how you "JFDI" ... if you can bootstrap and do it all yourself, then fine, JFDI. However if you want to attract finance from Angels, VCs or even get loans from banks you'll need some kind of justification and that requires a business plan. I'm a firm believer that a business plan changes as soon as you get any money (and the earlier stage the business is, the more guesswork and unrelated to reality the business plan is). However by doing a business plan, it shows you've thought about how the business is going to work. Building a business around technology and going "we'll build it and they will come" is in the most part, complete b*llocks. You need to show that you've at least thought about how revenues will be generated, if you haven't why are you running a business. Unless you're a charity (or a not for profit) your only reason for running a business is to generate shareholder value. That may sound corny, but that's why companies have shareholders!!! So JFDI is fine, but prove it's fine and that it's not just tech for the sake of it.