Planning 
Order of the Systems
You must specify the order in which you want to provide the systems with Support Packages. In a track, the NetWeaver Development Infrastructure (NWDI) recognizes four system roles (Development – Consolidation – Test – Production), which define how systems are provided with imports.
The runtime systems are updated in the order specified by the transport route in NWDI.
Tracks are provided with transports in the same way. Support Packages cannot be imported into a track until the source track of the Support Packages has itself received them.
NWDI Systems Without Runtime Systems
It is not always the case that all systems in an NWDI track are connected to a J2EE runtime system. If so, the Support Package import starts in the first runtime system in the track, as specified by the system's role.
In the first track of the NWDI landscape, the consolidation system and the production system are each connected to a runtime system. No runtime system is allocated to the development system. The JSPM import of the Support Package then starts in the first runtime system of the track (the consolidation system). However, the NWDI imports for the Support Packages must be performed early in the track – in the development system.
For more information, see:
Maintenance of an NWDI-Driven System Landscape