This document discusses the use of reference models in business process renovation when implementing ERP systems. It proposes using a reference model based on Microsoft Dynamics NAV to help companies select ERP systems that best fit their needs and renovate business processes. The reference model is designed using an upgraded version of BPMN (Business Process Modeling Notation) with additional business objects to provide more detailed descriptions. Reference models can formalize ERP system capabilities and allow companies to compare their business needs to select the most appropriate ERP package and approach for process adaptation.