# Airport Legacy-to-Modern Transition Most airports run on legacy monolith systems built in the 1990s and 2000s. The [[Airport Operational Database]] sits at the center, connected to everything via bespoke integrations. Replacing it is politically and technically painful. ## The Modern Architectural Pattern An Information Broker layer that sits above the AODB and all other systems, synchronizing data across the fragmented landscape into a single operational picture. Rather than replacing each legacy system, you build a connective tissue layer that normalizes and distributes data in real time. Same pattern as [[Knowledge Graphs for Industrial Data]] in process manufacturing: don't replace the historians, contextualize them. See [[Airport Data Integration Layer]] for the data source taxonomy. ## The Transition Vectors The modern shift runs along six vectors: 1. Siloed operations to collaborative decision making 2. Static pre-planned schedules to real-time adaptive replanning 3. Dashboard-centric "see what happened" to decision-centric "what should I do next" 4. Vendor-locked stacks to vendor-neutral optimization layers 5. First-come-first-served manual dispatching to constraint-aware automated scheduling 6. Monolithic AODB integration to middleware Information Broker architecture Each vector is independent but reinforcing. Progress on one makes the others easier. Related: [[Airport Operations MOC]], [[Airport Operational Database]], [[Airport Systems Fragmentation]], [[Airport Data Integration Layer]], [[Knowledge Graphs for Industrial Data]], [[Digital Twins]] --- Tags: #deeptech #systems