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#9
22nd August 2010, 04:41 PM
 Jim Wynne Cross Forum Moderator   Registration Date: Jan 2005 Location: Southeast Wisconsin Posts: 13,335 Thanks Given to Others: 1,781 Thanked 5,360 Times in 3,434 Posts Blog Entries: 2 Karma Power: 1445 Karma: 39244
Re: 5 x WHY (Form) attached

Quote:
 In Reply to Parent Post by Big Jim Don't get carried away with the number "5" in five why. Although you can usually get to the true root cause by going through the exercise of asking why and determining if it is the final why in five iterations, it may actually take more or less than five. Don't get tunnel thought on the number five. It takes as many as it takes, whether it take two or eight, the concept of five why still can be applied.
I always wondered about the 5-why thing. If a person isn't smart enough to know when he's found the answer (and must be prompted to keep asking "why?"), how can he be smart enough to know when to stop at all? It doesn't make sense on any level.
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 Thanks to Jim Wynne for your informative Post and/or Attachment!

#10
22nd August 2010, 11:01 PM
 Umang Vidyarthi Courtesy Access   Registration Date: Mar 2007 Location: Gurgaon / India Age: 67 Posts: 875 Thanks Given to Others: 374 Thanked 447 Times in 249 Posts Karma Power: 121 Karma: 4366
Re: 5 x WHY (Form) attached

Quote:
 In Reply to Parent Post by Jim Wynne I always wondered about the 5-why thing. If a person isn't smart enough to know when he's found the answer (and must be prompted to keep asking "why?"), how can he be smart enough to know when to stop at all? It doesn't make sense on any level.
I agree with you Jim.

Taiichi Ohno (architect of TPS), described the 5-whys method as "the basis of Toyota's scientific approach . . . by repeating why five times, the nature of the problem as well as its solution becomes clear." This method of root-cause-analysis went beyond Toyota and spread over the world. Taichi Ohno felt that five iterations of 'why' would suffice to surface any problem, and it became a rule of thumb. But in TPS (Toyota Production System) too, asking 'whys' was not restricted to five times. Despite going beyond 'five times' at times, this method continued to carry the original title '5-why'.

Later, someone (perhaps Peter Scholtes) started using the '5-why' analysis under the name of 'why-why' analysis, and today both the nomenclatures are concurrently in use.

Umang
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#11
5th January 2011, 08:02 AM
 dyonisius Shy Poster (1 to 5 Posts)   Registration Date: Jan 2011 Posts: 1 Thanks Given to Others: 0 Thanked 0 Times in 0 Posts Karma Power: 10 Karma: 10
Re: 5 x WHY (Form) attached

Really good info here folks, thank you very much.

 The Elsmar Cove Forum 5 x WHY (Form) attached

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