Base contact history (UA_ContactHistory)

One row is written to the base contact history table for each combination of contact ID, cell, and flowchart run date/time, for target cells as well as control cells.

Mutually exclusive cell membership

If your cells are mutually exclusive, and each ID can belong to only one cell, then each ID has one row in the contact history table when it is treated within a single contact process, regardless of the number of offers assigned. For example, this is the case if you define cells that correspond to "Low," "Medium," and "High" value segments, and customers can belong only to one of these segments at any given time. Even if the "High value" segment is given 3 offers in the same contact process, only one row is written to base contact history, since base contact history records cell membership.

Non-exclusive cell membership

If individuals can belong to more than one target cell (for example, if each of your target cells receives offers based on different eligibility rules, and customers might qualify for none, one, or more than one of the offers), then each individual has the number of rows in the contact history table corresponding to the number of cells in which that individual is a member.

For example, if you define two cells: "Customers who have made purchases within the last 3 months," and "Customers who have spent at least $500 in the last quarter," an individual could be a member of one or both of these cells. If the individual is a member of both cells, two entries are written to the base contact history for that individual when the contact process is run.

Even if multiple rows are written to the contact history table for an individual because he or she belongs to more than one target cell, all offers given in the same contact process are considered to be a single "package" or interruption. A unique "package ID" in the contact history table groups together the rows written by a particular run instance of a specific contact process for an individual. Multiple "interruptions" to a person or household would occur only if the individual or household belonged to multiple cells in separate contact processes.