Air Serbia documented reservation, scheduling, and ground-operations flows to support fleet and long-haul expansion.

Air Serbia, the Belgrade-headquartered Serbian flag carrier, has been growing fleet size and route network — including new long-haul services — since its rebrand from JAT Airways. The reservation, scheduling, crew-rostering and ground-operations workloads that keep the airline running each day sit on a legacy COBOL stack that had been incrementally extended as the airline expanded, with documentation that hadn't kept pace.

COBOLpro captured the passenger reservation handoffs to the departure-control system, the crew-rostering and pairing logic, and the ground-operations batch processes that move flights from schedule to dispatched. Each flow was validated with the operations engineers responsible for it, and tagged against the operational scenarios — fleet-mix changes, long-haul-specific handling, irregular-operations recovery — that drive change traffic.

Operations and IT now share a reviewed reference for change planning that scales with the airline's growth. New aircraft types, new long-haul routes, and operational-recovery scenarios are assessed against documented behaviour first — so the systems that underpin daily operations stay stable while the airline keeps adding capacity.