The Chief of Staff (CoS) is responsible for establishing clear KPIs and follow-up routines to measure the success of cultural integration following M&A. Common methods are employee surveys, pulse measurements, and feedback forums where employees can express their experiences of culture, leadership, and collaboration. The CoS also monitors key metrics such as staff turnover, engagement indices, and the number of integration activities completed. The results are analyzed and used to adjust the integration strategy as needed, for example by strengthening communication, offering additional training, or creating new forums for dialogue. In Swedish organizations, it is important that the follow-up is transparent and that the results are shared with both management and employees. By working data-driven and responsive, the CoS can ensure that cultural integration becomes a living process that is continuously improved and adapted.