Gurus of Quality: TAGUCHI

Genichi Taguchi
Gen'ichi Taguchi (田口玄一) (born January 1, 1924 in Tokamachi, Japan) is an engineer and statistician. From the 1950s onwards, Taguchi developed a methodology for applying statistics to improve the quality of manufactured goods. Taguchi methods have been controversial among some conventional Western statisticians but others have accepted many concepts as valid extensions to the body of knowledge.
Contents
1 Life
2 Contributions
2.1 Loss functions
2.2 Off-line quality control
2.2.1 System design
2.2.2 Parameter design
2.2.3 Tolerance design
2.3 Design of experiments
2.3.1 Outer arrays
2.3.2 Management of interactions
2.3.3 Analysis of experiments
3 Assessment
4 Honours
5 Footnotes
6 External links

Taguchi methods are statistical methods developed by Genichi Taguchi to improve the quality of manufactured goods, and more recently also applied to biotechnology[1], marketing and advertising. Taguchi methods are considered controversial among some traditional Western statisticians, but others accept many of his concepts as being useful additions to the body of knowledge.
Taguchi's principal contributions to statistics are:
Taguchi loss-function;
The philosophy of off-line quality control; and
Innovations in the design of experiments.

Contents
1 Loss functions
2 Off-line quality control
2.1 System design
2.2 Parameter design
2.3 Tolerance design
3 Design of experiments
3.1 Outer arrays
3.2 Management of interactions
3.3 Analysis of experiments
4 Assessment
5 Bibliography
6 See also
7 References
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