A cross filter with WITHOUT logic is a method for creating a report that shows accounts that are missing certain related records. A cross filter is a filter that lets you include or exclude records in your report based on related objects and their fields. You can use cross filters to create reports on accounts with or without opportunities, contacts, cases, or other related objects. In this case, you can use a cross filter with WITHOUT logic to show accounts without assets that have a certain product name or code. This way, you can identify customers that need to install a new solar panel monitor system. Reference: https://help.salesforce.com/s/articleView?id=sf.reports_cross_filters.htm&type=5 https://help.salesforce.com/s/articleView?id=sf.reports_examples_cross_filters.htm&type=5