Workflow technology promises an increase in efficiency in the execution of business processes. The technology is widely accepted, but often the high costs exceed the promised benefits. Most companies perform an evaluation of workflow management systems (WFMS) tools before selecting their tool of choice. In this paper a method for selecting a WFMS is presented that is used in practice at Raiffeisen Informatik GmbH - an IT service provider of a banking corporation. The WFMS selection is based on a criteria catalogue covering aspects of functionality, architecture, integration, robustness, and secured prospects.