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