The copilot. He is the alter ego of the surgeon, able to do any part of the job, but is less experienced. His main function is to share in the design as a thinker, discussant, and evaluator. The surgeon tries ideas on him, but is not bound by his advice. The copilot often represents his team in discussions of function and interface with other teams. He knows all the code intimately. He researches alternative design strategies. He obviously serves as insurance against disaster to the surgeon. He may even write code, but he is not responsible for any part of the code.
