http://developers.de/blogs/damir_dobric/archive/2013/06/11/ordered-workflow-activation-in-sharepoint-workflow-manager.aspxImaging you are receiving some events which have to be used to activate new workflow instance Wi of some workflow type W. As long the workflow completes faster than new events arrives, successive workflow activation will execute ordered. That means forenCommunityServer 2008 SP1 (Build: 30619.63)