You need to capture changes from multiple DB2 subsystems on the same z/OS image. The subsystems are not data sharing subsystems or are not part of the same data sharing group. For example, the subsystems might be test and production subsystems on the same z/OS image.

You need to capture changes from a single DB2 subsystem and use separate capture environments for separate sets of tables. For example, the DB2 subsystem might contain both test and production tables, and you want to use separate capture environments for the test and production tables.