Right from the design stage, we integrate a comprehensive evaluation system to measure short- and medium-term impact. Quantitative indicators (participation rates, digital engagement , knowledge quizzes) and qualitative indicators (verbatims, collaborative productions) are collected daily. A before/during/after climate barometer measures changes in the sense of belonging and cohesion. Three months after the operation, an impact assessment measures the lasting effects on corporate culture, inter-team collaboration and collectiveengagement .