The project was developed between Italy, France and Romania, defining the various stakeholders involved in the value chain and their needs. Lean Testing then verified (through the simulation of attempted sales of a product still being launched), for each stakeholder, the assumptions of value (e.g. pricing, technological configurations, sales speech, payment methods, …) and the necessary improvements to the sales model (from selling a product to selling a service related to the well-being of the user) to convey it in the best possible way