Time is an important aspect of business process management. Here we revisit the following contributions of early workflow time management approaches: representation of temporal information and temporal constraints, analysis of temporal constraint satisfiability, and computation of workflow execution plans that satisfy temporal constraints. In particular, we summarize some of the most important research efforts and results in: (a) modeling temporal aspects of workflows, (b) analysis of temporal

more »

... roperties of workflow models, (c) computation of workflow execution schedules, (d) minimization of exceptions due to violation of temporal constraints, (e) monitoring of temporal workflow aspects, and (f) modeling and calculation of temporal properties for distributed workflows and for guaranteeing Quality of Service in Web-service composition. J. Eder ( )