Fairness

Villagers on both banks shared a ferry bridge. The old boatman ferried back and forth in order of the queue; though slow, everyone generally felt it was fair.

Later, the dock installed a scheduling abacus. It arranged ship departures based on cargo volume, weather, ticket prices and historical on-time rates, with the goal of minimizing total waiting time.

After the abacus went live, overall efficiency improved. But the east-bank villagers found they were often delayed, especially on market days, always waiting three more ferries than the west bank. The west-bank merchants said everyone's average wait had shortened, so why quibble. The east-bank people laid out the records of the elderly, the pole-carriers and the market women, and only then did the dock see the fixed losers behind the average.

The dock first said average waiting times had shortened, proving the system worked. Then the East Bank people brought out the records: the average looked good, but it concentrated the losses on the same group of people.

The steward began examining results by group: looking at waiting-time differences by shore, time period, cargo-passenger type and special needs, and asking whether the differences had legitimate business reasons. The first adjustment overshot again—the east shore was prioritized too much, and urgent cargo piled up on the west shore. The steward realized that fairness was not simply reverse compensation; it also required explaining the source of differences and the acceptable range.

They adjusted the rules so that efficiency goals were simultaneously constrained by fairness. If one side suffered repeated losses, the system had to explain the reason, trigger a review, and if necessary sacrifice a little overall speed.

Later the ferry bridge did not achieve complete sameness for every person every time, but it no longer let the same groups repeatedly bear invisible costs. So the dock posted the explanation in the boat shed: when order would be first-come-first-served, when urgent cargo would take priority, and when people with limited mobility would be accommodated; anyone who felt harmed could use a ticket to request review. The ferry bridge also published monthly records. If one bank consistently waited longer, the manager had to explain whether it was weather, cargo volume, or a rules problem; if the explanation did not hold, adjustments had to be made. Fairness needs to be seen, and cannot rely only on the manager's own claim.

The village learned that being faster overall does not mean everyone is treated fairly. To judge whether a ferry bridge is good, you cannot look only at the average wait time; you must also see which group waits repeatedly, whether the differences have legitimate reasons, and whether they can be discovered and corrected.