A simple method to design good experiments

To achieve the six-sigma quality, the improvement tool of design of experiments can not be ignored. In fact, many six-sigma projects involved the applications of this tool in various companies. To have experimental designs in good quality, we expect to use the best way to set up experiments, so-called minimum aberration experiments. In this article we propose a simple method to design such experiments. The technique used in the method is orthogonal array, first proposed by Taguchi and Wu. This method can be easily adopted by engineers.