ActiveControl allows for inter-dependencies to be defined between transports in the same system (for example, if a functional Customising transport is dependent on a particular Workbench transport), and also for cross-system dependencies between transports being deployed in different SAP development systems (for example, if a BW transport is dependent on a particular ECC transport)
In both cases, these Transport Dependencies are defined on the ‘Advanced Options’ tab of the Transport Form in the Web Platform or in the SAPGUI.
Technically, when ActiveControl checks a dependency where transport A (D01K963789) is dependent on the prior import of transport B (D01K986055), it checks whether transport B has been applied to the SAP system that transport A is being applied to, or that transport B has been applied to at least one other SAP system with the same role as the SAP system that transport A is being applied to.
Figure: Example of a Transport Dependency seen within SAPGUI
Figure: Example of a Transport Dependency seen in the Web Platform UI.