The purpose of the evolutionary operations methodology (EVOP) is to improve a process through systematic changes in the operating conditions of a given set of factors. An experimental design is established and conducted through a series of phases and cycles. The effects are tested for statistical significance against experimental error when such error can be calculated. When a factor is found to be significant, the operating conditions for that factor are reset and the experiment conducted again. This process continues until no further gain is achieved. Hence, the concept of an evolution is established.