Demand inversing is a method to adjust the assigned pressure junction demands in the water model to accurately match the real world demands. To calculate the real demands, Demand inversing requires the user to identify the boundaries of each zone, the inflow and outflow points, the tanks signals, and the SCADA tag associated with each value needed.

With this information, and SCADA data for a full day, the real world total daily demands of each zone can be calculated. The application can then find a multiplication factor that can be applied to each pressure junction's demand field in the model to make the simulated zone demand equal to the real world demand for that day.