The new Swedish method for archival description will be introduced the first of July 2008. The new method is built upon process modeling and will document how records are connected to the processes where the records have been created and managed. The aim with this article is to describe a method to reconstruct processes. The method has been used in a study where I have studied which components that make it possible to reconstruct processes afterwards. The method could serve as a complement to traditional process modeling methods which often builds upon seminars where participators together design todays and tomorrows processes. The method that has been used in the study presented in this paper is from this viewpoint different because it strives to understand and describe how the process has looked like. The method includes three steps; Data collection in archives, process modeling and validations seminars. The result from using the method has showed that it could be a helpful tool.