Robust engineering approaches to maximize results in business, cost, engineering, human, quality and system technologies

Robust engineering is a new branch of engineering techniques developed by Geinichi Taguchi, in the early fifties in Japan. It is now in wide use throughout the western world, after the tremendous success of several industrial applications. The article shows that the so called robust designs are orthogonal arrays formally identified with fractional factorial designs, constituting a design matrix for the controlled variables and another for the uncontrolled variables in such a way that the response is obtained under the settings of the uncontrolled variables matrix, that will give the variances of the system, and analyzed via the mathematical transform, the signal-to-noise ratio, for optimization of the controlled variables and their levels.