'<h2 class=abstract> Session: System construction, practice and theory </h2> <p class=papertitle> Process control systems integration using object technology <p class=paperauthor> D.N. Ramos-Hernandez, P.J. Fleming, S. Bennett -- U. Sheffield <p class=paperauthor> J.M.Bass -- Chordiant Software International Inc., London <p class=paperabstract> The design of a control software design environment, namely the Integrated Design Notation (IDN) is presented. IDN supports the design, development and implementation of decentralised distributed control systems.  A cable extrusion process is targeted as a demonstrator application, where object-orientation technology is expected to facilitate the improvement of extruder control in a distributed environment. The IDN is based on the Unified Modelling Language (UML). A CASE tool supporting UML is integrated with the IDN. The translation to integrate a control software tool (Simulink) and options to generate automatic Java code are described.  '