Having gone through this process several times, I've found that the most important part of the 'idea vs implementation' equation is 'mutual complementarity'. Regardless of where the 'idea' comes from the participants must agree both on the 'problem statement' ie. 'having multiple information screens in a single household is inefficient' and on the 'problem solution' ie.'unify information screens'. If you agree on this, then you simply lay out the tasks required to complete the work. Finally, the skills needed to complete the task should only overlap in accordance to the quantity of work that needs to be done. So, in starting out, when it's important to have the breadth of skills, it's important to minimize the overlap. So while the Idea person may be the developer, they may also be the designer, the marketer, the seller, the writer, the networker, the motivator, or the enabler, all essential elements to successfully solving a problem statement. So the a priori ideas that a)ideas are negligible compared to implementation eg 1% inspiration vs. 99% perspiration and b) the lone genius has a higher success rate, appear in retrospect to be false, since in actuality it appears that [two is indeed the magic number](http://www.slate.com/id/2267004/pagenum/all/#p2)