The alignment of business processes and information systems is a critical factor for both business process management (BPM) and enterprise resource planning (ERP) system efficiency. Analysing existing approaches of alignment shows the need for an independent reference model to support the mapping between organisational and informational views. The SCOR model represents a strong management tool to evaluate, control, measure and improve existing supply chain process structures, based on a business process view of supply chain highlighting the functional requirements of best practices identified. We have critically analysed the contribution of the current SCOR model to the alignment of business processes and information systems. As the alignment is currently only based on the functional realisation of best practices, we show that this alignment risks neglecting important process dependencies. An extended reference model is then proposed, including the structuring of information exchanged between processes. That results in a more complete process map highlighting all physical and informational dependencies, in a multi-view of 'business process mapping' including the informational dimension, and thus a more precise alignment of ERP systems with processes.