Rows are added to the treatment history table (UA_Treatment) each time a flowchart is run in production mode. In other words, if you have a flowchart scheduled to run periodically, each new run generates a new set of treatments, one for each offer per cell, for both contact and control cells, at flowchart run time. Campaign thus provides the most granular tracking possible, by recording as a separate instance each time a treatment is generated.Treatment history works together with base contact history to provide a highly compressed and efficient way to store complete contact history information. The base contact history table (UA_ContactHistory) records only the cell membership information for the appropriate audience, while the treatment(s) given to each cell are recorded in the treatment history table (UA_Treatment).