"Taiichi Ohno is known to have said that "having no problems is the biggest problem of all." He viewed problems not as a negative but as a "Kaizen opportunity in disguise." Whenever problems arose, he encouraged his staff to investigate the problem at the source and to as "ask ‘why’ five times about every matter"
5, of course, being utterly arbitrary, and even when it does work, its largely luck. Root cause analysis is a science, why5 is guess work, done 5 times.
"Taiichi Ohno is known to have said that "having no problems is the biggest problem of all." He viewed problems not as a negative but as a "Kaizen opportunity in disguise." Whenever problems arose, he encouraged his staff to investigate the problem at the source and to as "ask ‘why’ five times about every matter"
http://www.shmula.com/382/ask-why-five-times-about-every-mat...
http://en.wikipedia.org/wiki/5_Whys