The HEC Montréal ERP Simulation Game is a real time simulation game that puts students in a situation in which they have to run their business with a real-life ERP (mySAP ERP). Teams of five to six students operate a firm in a made-to-stock manufacturing supply chain and must interact with supplier and customer by sending and receiving orders, delivering their products and completing the whole cash-to-cash cycle. A simulation software, called ERPsim, was developed to automate the business environment of the ERP systems of the competing teams.