Correct propagation of process type changes to long-running process instances and the capability to perform ad-hoc-modifications of individual process instances are essential requirements for any process management software. In particular, in many cases it becomes necessary to propagate process type changes to individually modified process instances as well. In doing so, one must not only enabl...

Cloud vendors such as Amazon EC2 offer two types of purchase options: on-demand and spot instances. An important problem for all users is to determine the way of utilizing different purchase options so as to minimize the cost of processing all incoming jobs while respecting their response-time targets. To be cost-optimal, the process under which users utilize self-owned and cloud instances to p...