http://www.isixsigma.com/methodology/design-for-six-sigma-dfss-methodology/dmadv-case-study-performance-management-system-redesign/
http://www.whatissixsigma.net/six-sigma-dmadv/
http://www.slideshare.net/anandsubramaniam/dmaic-vs-dmadv
http://bm.nsysu.edu.tw/tutorial/iylu/12th%20ICIT/03-06.pdf