I'll second that writing the business plan is extremely helpful for the business itself. Like almost anything else, when we applied high standards to what we wr

I'll second that writing the business plan is extremely helpful for the business itself. Like almost anything else, when we applied high standards to what we wrote, we uncovered a lot of unchecked assumptions, and good ideas, and manner of argument for your business. In the process of writing the plan, we also created it. We managed to nail down many of the engineering milestones we'll want to hit before our next round, went through a half dozen design iterations, including the introduction of two technologies that may be significant breakthroughs, created a multi-physics computer model of our engine and drivetrain, located automotive design and CAD contractors who've been providing us great schematics and visual concepts, and have clarified the entire development, procurement and hiring schedule.