Evolutionary operation, as originally presented by G. E. P. Box in 1957, is now an accepted means of improving the performance of industrial processes. Numerous articles have since been published relating to the successful application of this procedure and they indicate that the technique is one of general industrial importance. It is the purpose of this article to review briefly these applications, thus providing a source of references useful both to those familiar with EVOP and those wishing to examine the potential applicability of the method for an existing process.