The paper presents applications of a new interactive tool for system identi
fication and controller design. The tool has been applied to two control lo
ops at the pulp and paper mill of M-real Sverige AB in Husum, Sweden. The a
pplications are temperature control of a starch boiler in the coating kitch
en. and steam pressure control in a drying section of a paper machine. The
tool lias a graphical User interface for rapid system identification and PI
/PID controller design.