Two IBM z16 Model A01 frames (production + DR) - Parallel Sysplex: CNBPLEX with four LPARs (CNBPROD1-4) - Coupling Facility: Two CF LPARs (primary + alternate) on each frame - DB2 13 for z/OS, data sharing group DB2A with four members - CICS TS 5.6: 30 CICS regions across all LPARs (TORs, AORs, FORs