Tatsuya Matsui & Hiroaki Kitano, with ties to SGI (Silicon Graphics Inc) both believe that a robot’s exterior appearance will dramatically affect how humans perceive and interact with them, including whether or not we will accept them at all.
SIG was never completed, but was designed with the rule of thirds in mind, an ancient artistic measurement which defines beauty. During SIG’s development, it was determined that the female body is roughly the right size for a robot to coexist with human beings. If a robot is too small, it will appear child-like which may betray its function. If a robot is too large, it will not be adopted by the public for fear of it overpowering the space it occupies. While SIG is destined to never leave the laboratory, she was instrumental in shaping Matsui-san’s philosophy. Since leaving SGI to form his own company, he has stressed the importance of outward beauty complementing the hidden inner complexity of his robots. Had SIG been completed, it would have stood 168cm (5’5″) tall.