This is a Special Interest Group (SIG) for anyone interested in Object-Process Methodology
(OPM) which is a compact conceptual approach, language, and methodology for modelling
and knowledge representation of automation systems. The application of OPM ranges from
simple assemblies of elemental components to complex, multidisciplinary, dynamic
systems. OPM has been adopted by the International Organization for Standardization,
ISO, and on December 7, 2015 it was published as a normative ISO 19450 document at
Over the past two decades, Prof. Dov Dori of the Faculty of Industrial Engineering and
Management at the Technion has been developing Object-Process Methodology (OPM) as a
language and method for conceptual modeling of complex systems of any kind, be it
artificial or natural. An OPM model expresses both graphically and textually the architecture
of the system: Interconnected diagrams at varying levels of detail, from a bird's eye view
to any desired number of "nuts and bolts" views, specify any conceptual and logical aspect
of the system. Each graphic expression is translated on the fly to a corresponding textual
specification in a plain subset of English.
A basic premise underlying OPM is that one can build a model of any system in any domain
and at any level of complexity with the most minimal set of building blocks: stateful objects
(objects with states) and processes that create or consume objects, or change their states.
Over the last decade, Technion students at the Enterprise Systems Modeling Laboratory
developed OPCAT (Object-Process CASE Tool), a software package that is available freely
from the Lab's website http://esml.iem.technion.ac.il/ and translates the user's graphic
input into simple English in real time. This enables quick model development jointly by the
customer and the system architects and engineers, and reliable verification of the model as
it is being created.
The SIG is managed by Dr Pathmeswaran Raju of Cranfield University, UK.