The aim of this tool paper is twofold: First we show that VipTool [9, 2] can now synthesize Petri nets from partially ordered runs. To integrate this extension and further new functionalities, we changed the architecture of VipTool to a flexible plug-in technology. Second we explain how VipTool including the synthesis feature can be used for a stepwise and iterative formalization and validation procedure for business process Petri net models. The synthesis functionalities fill a gap in a previously defined procedure [9, 7] where the first definition of an initial process model had to be done "by hand", i.e. without any tool support.