Knowing and optimizing the environmental impact of business processes is gaining momentum for today’s organizations. However, there is a lack of solutions that guide and support organizations in determining the power consumption of automated business processes, considering the resources and services used by that process. In this work we propose a comprehensive, multi-phased methodology and corresponding solutions that guide stakeholders through the methodology. As a proof-ofconcept we build up an experimental testbed capturing the power consumption of Web services and propagating this information to business processes. The proposed approach supports stakeholders analyzing their automated business processes with respect to their environmental impact and is therefore supporting green business process reengineering.