ABSTRACT
Box presented a technique known as evolutionary operations, or EVOP, specifically to overcome these difficulties. Evolutionary operations can be used on the production line with existing personnel. It is therefore recommended that EVOP procedures be limited to studies of one or two variables only rather than extended into broad studies of all possible variables. The stream of information concerning the products from the various manufacturing conditions is summarized on an information board prominently displayed in the plant so that interested personnel can follow the progress of the operation. Since this is the first cycle of the first phase we have no figures upon which to determine a standard deviation so authors use a prior estimate of standard deviation based on previous work.
