This article has investigated the Taguchi philosophy in quality control. And discussed the difference between Taguchi's new concepts, in quality control, and the traditional goalpost philosophy. It has shown that in Taguchi's view, the measurement of the quality of a manufactured product, is the total loss generated by that product to the society. Taguchi defines the quality control of a given product as "achieving the targeted value and minimising the variability around the target value", instead of "achieving conformance to the specification".
The Taguchi quality strategies discussed are derived from several experiment techniques used in the product design stage to implement the quality concepts into the product. Taguchi proposed the idea of brainstorming to define the processes and factors which create the product, followed by a series of experimental implementation, outlined by Taguchi's quality concepts, to determine the optimum parameters to be implemented in the parameter design stage of the product.
Taguchi suggested the use of Orthogonal Arrays(OA), in the experiment implementation stage, to investigate and predict noise factors which might affect the quality of a given product during the product manufacturing phase. Through OA experiment analysis, the quality influencing factors of a product can then be identified, controlled, and hence compensated during early product design stage.