Perspective on the Taguchi Controversy


Hare, Lynne B.   (1990, ASQC)   Thomas J. Lipton Company, Englewood Cliffs, NJ

Annual Quality Congress, San Francisco, CA    Vol. 44    No. 0
QICID: 9480    May 1990    pp. 381-384
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Article Abstract

Taguchi's ideas for quality and productivity improvement are examined from the points of view of both statistical correctness and effectiveness. Discussed in detail are:

  • the loss function with a view of product specifications,
  • the concept of transmission of error,
  • accumulation analysis,
  • an example of the application of a 34-2 fractional factorial design or the L9 array,
  • design strategy and choice, and
  • graphical design generation.
It is concluded that many of Taguchi's basic ideas have merit but that there is little value, and potential harm, in using them directly. Rote application of the so-called Taguchi methods often leads to missed opportunities because it promotes short term successes at the expense,of long term gains. Instead of blindly following the methods, we should build on Taguchi s ideas to develop more powerful statistical tools for quality and productivity improvement. Some successes in this area are evident.


Taguchi method,Statistics

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