Early on, the teams were encouraged to build prototypes so that they could "bump them up against reality and discover for themselves the strengths and weaknesses of their particular approach."
در ابتدا دو تیم تشویق به ساخت تمونه‌های اولیه شدند که بتواند "با واقعیت مواجه شوند و ضعف‌ها و قوت‌های دیدگاه مختص خودشان را اکتشاف کنند."