Why visual inspection complements routing KPIs
Aggregate indicators summarize important dimensions of a routing solution. Service rate, waiting time, distance, utilization, runtime, and rejected requests describe what the system achieved.
They do not show every movement that produced the result. Route replay adds this spatial and temporal view.
Research origin
During mobility-on-demand experiments, visual replay revealed vehicles concentrating in high-demand areas, ignoring diminishing returns, or moving in cyclic patterns. Direct inspection made these behaviors easier to diagnose.
Teaching use
The same approach later supported the Transportation and Logistics Management course. Students inspected solver outputs and checked whether the resulting routes behaved as expected.
ViaViz
ViaViz grew from this research and teaching need. The workbench complements quantitative evaluation with visual inspection of routes, waiting, delays, service, and dispatch behavior.