並前往http://guo.ba.ntu.edu.tw/%E6%95%99%E5%AD%B8%E8%AA%B2%E7%A8%8B/%E5%A4%A7%E5%AD%B8%E9%83%A8/%E5%93%81%E8%B3%AA%E7%AE%A1%E7%90%86/%5BOLD%5D%E8%AC%9B%E7%BE%A9%E5%92%8C%E4%BD%9C%E6%A5%AD/six_sigma.pdf