The Swiss National Forest Inventory (NFI) is one of the most important environmental monitoring programs in Switzerland. The core objective is to provide different interest groups with data and information on Swiss forests. This information can be tailored to customers’ needs by those producing the data and reports in the NFI program. To support the producers in this, the program leaders initiated the NAtional Forest Inventory Data Analysis System (NAFIDAS). Since customers may have different needs at different times, the system has to be constantly ready and regularly issue data for reports and analyses that comply with very high quality stand ards. In addition, changes and updates in the data and the algorithms must be trackable at all times.