Towards the Boundary of Concurrency

The support of highly concurrent engineering work
proposed in this paper is achieved by means of an
Event - Condition - Action (ECA) rule • based
synchronization component. Process and product
information are managed in a database according to
the Concurrency Model, a semantical process and
product data model. The definition of ECA rules allows
the active database to recognize conflicts at run-time
and to execute pre-defined confict solving actions.
Thus a high degree of concurrency can be achieved
without demanding fixed workflows. The Concurrency
Model approach supports the explicit control of
workflows and data flows, concurrent access to data
and control of redundancy. Scheduling decisions and
cost evaluation for projetr planning and control are
supported by rhe simulation capabilities of our approach.