The invention relates to a method for establishing communication plans for a divided real-time computer system comprising remote communication computers, wherein a) a raster (RAS) is established, said raster containing all the parameters which are necessary to provide a principle communication between nodes (KR1...KR5) of a cluster (CLU), b) node communication plans (KPG; KP1, KP2) for all planted nodes as identical parts (KR2; KR2, KR3) are derived from the raster (RAS) and all of the parameters of the raster are taken and the node-specific parameters are added and c) cluster-communication plans (CP1, CP2; CM, CL2) are derived from the node communication plans (KPG; KP1, KP2), which also contain, in addition to all of the parameters of the raster and the node-specific parameters of the identical parts, the parameters which relate to remaining nodes of the cluster.