The best way to reassure the client that the data has been accurately calculated is to launch the calculations of the Advanced Account Forecast and compare the values with the legacy system. This will ensure that the forecast metrics, such as planned revenue, actual revenue, forecast quantity, and forecast revenue, are consistent and correct. The administrator can use the Data Processing Engine templates to configure the calculations and run them manually or on a schedule1. The administrator can also view the forecast results in the Accounts Health dashboard or the Account Forecast tab2. Using Data Loader to generate a .csv file and manually compare it to import files is not a reliable method, as it may introduce errors or inconsistencies in the data format or values. Requesting the users to verify the Advanced Account Forecast values of their accounts is not a feasible method, as it may be time-consuming, impractical, or inaccurate, depending on the number and complexity of the accounts. References: Learn How Forecast Data Is Created, View and Adjust Forecasts