Establishing a business plan and calculating the return on investment (ROI) are essential elements of any digitalisation project, especially on the perimeter of the Purchases, procurement and accounting suppliers. The latest Webinar organized by Acxias on April 28, 2021, with the testimony of Thièry Bourany, Director of Purchasing Processing at the Nexans Group, allowed the 30 or so participants to discover the basics of profitability calculations digital procurement projects needed to gain management buy-in. In addition to sizing potential gains and resources to be committed, the two basic elements for determining ROI, the approach allows to specify the issues as well as to project the planning of the site. It also helps to identify objectives and indicators that will serve as a benchmark throughout implementation and deployments.