Extension of rescheduling based on minimal graph cut

Abstract

An important role of a workflow system is to schedule and reschedule the workflow process and to allow the user to monitor and guide the overall progress of the workflow and its activities. This paper presents extensions of a rescheduling algorithm based on minimal graph cut. The initial approach allowed to find an optimal rescheduling, which changed the initial schedule by shortening and moving of activities. The new schedule had the lowest overall price, counted as the sum of prices of shortening activities. The extension presented in this paper allows several extensions, while keeping the optimality: handling several delayed activities, handling the price of moving an activity and handling the price of deadline violation. The rescheduling algorithm is used within an ontology-based workflow management system for the process of military exercise preparation in Centre of simulation technologies National Academy of Defence. © Springer-Verlag Berlin Heidelberg 2008.