“Design and analysis of industrial experiments”*

Summary Design and analysis of industrial experiments This paper is based on a lecture on the “Design and Analysis of Industrial Experiments” given by Dr O. L. Davies on the 8th of May 1954 to the Industrial Section of the “Vereniging voor Statistiek”. Production, formulation, and testing are distinguished as three separate fields of chemical activity where experimental designs can be applied, and various numerical examples of such experiments are discussed in detail. They consist of a 2 3 factorial design, a 2 4 half replicate and a 2 5 quarter replicate fractional factorial design, and a three‐way classification. In a final section the recent designs developed by Box for the exploration of response surfaces are briefly considered.