The one-third rule for PI controller tuning

Despite academic advances in PID controller design and development of automatic tuning procedures, there are still many PID controllers that are badly tuned, or not even tuned at all, in process industry. There are several reasons for this, but one major reason is that it is considered too time consuming to use current PID controller tuning methods. This paper presents a new tuning method that is significantly simpler and faster to use compared to the methods that form the current industry standard, but still gives tuning parameters that are fairly close to those obtained by the more advanced methods