An elevator system having elevator cars in a building, the system having: a first elevator car of the elevator cars configured to execute a self-diagnostic routine, wherein the first elevator car is configured to: instruct a subset of the elevator cars to enter an idle mode and analyze data shared by the first elevator car; process the operational data among the subset of the elevator cars; process the operational data among the subset of the elevator cars; collect operational data; share the operational data among the subset of the elevator cars; receive from the subset of the elevator cars an analysis of the operational data that is indicative of an operational state of the first elevator car; determine that a fault condition exists when the operational state is outside a threshold; and automatically execute a predetermined response upon when the first elevator car determines that the fault condition exists.