Several sources indicate that assessment in a Living Lab is recurrent, in so far as each stage of design is immediately followed by assessment of what has been produced. The ergonomic approach, mentioned as one of the methods of co‐design, involves an evaluation dimension that is in fact iterative in nature. Impact assessment focuses on the solution's effectiveness for the patient, on the system of work or activity, but also more broadly at organizational level and in public healthcare. This healthcare technology assessment should be carried out by a team other than that responsible for the design phase. The new approach to measuring the impact of public policies, published by the Organization for Economic Cooperation and Development offers new pathways for bringing iterative assessment together with global assessment used in healthcare. Evaluating the impact in terms of public policies requires measurements that differ in nature from those of ergonomics, since they lie outside the solution.