ABSTRACT
Construction projects are one-of-a-kind undertakings
characterised by one-of-a-kind products and proc-
esses, complex one-of-a-kind partner relationships,
frequently changing tasks and high dependency on
external factors like weather, transportation, various
socio-political aspects etc. In such virtual organisation
environments achievement of dynamic (ad hoc) proc-
ess support is a critical issue as comprehensive process
planning is rarely possible in advance. Indeed, model-
lingof the constructionprocess canbedoneat theout-
set using e.g. theARISmethodology (cf. Scheer 2000),
and event-driven process chains (EPCs) in particular.
However, EPCs lack fully formalisedmechanisms that