Compliance "Writers" take the data from the Staging Tables, normalizing it where required, and write the results into the Operational Tables in the Compliance Database. They perform recognition of newly-inventoried evidence against the ARL (Application Recognition Library) and evaluate any pending automated purchase processing. After that, they recalculate license consumption (or 'reconciliation') using the most recently updated data.
These happen during the writer process, these match computer records from the staging (imported) tables and merge them into a single record. Such as devices within the importedcomputer table, will sometimes have multiple records, depending on if multiple inventory connectors are used. This is to make sure that there are no duplicate devices are shown within the FNMS UI