Once the models have been linked the next step is to configure the data extract groups. A data extract group specifies the location of the gridded and time series data required for the different model alternatives. For example, this could be gridded precipitation data in DSS or observed flow data from another DSS file. Once you have completed computing your forecast, you might want to post results back to the HEC-RTS DSS study file. This task is completed by creating post groups that specify what time series data needs to be save. Refer to Data Extract and Post Editors for additional information.