Fable
The theater repairer, and the harbor dispatcher
The old city faced two problems at once. The first was that the city's old theater was broken: the roof leaked, the backstage lights were scrambled, and actors heard noise when they walked to the left side of the stage. The second was that the port had hundreds of messages pouring in through different entrances every day: semaphore, telegraph, letters, summons, word of mouth. No one knew which had been handled and which was still stuck.
The city lord first gave both problems to the same person. He thought that since both were complex systems, finding one clever craftsman should solve them both. The craftsman moved into the theater, and the effect was very good. He pored over blueprints, read maintenance records, tore open wall panels, and changed wiring, and with every change he had the actors walk through the stage steps again to confirm whether the problem had disappeared.
But when the city lord put him in charge of the port, the problem changed immediately. A port is a whole set of city entrances in operation: some people come in to submit requests, some need approvals, some need to check historical records, and some need to continue tasks left unfinished yesterday. No matter how capable a person who can fix things is, he cannot handle it all.
So the city lord built a dispatch office. The dispatch office did not personally repair every plank, nor did it directly do every worker's job for them. It was responsible for connecting all entry points, registering message sources, preserving context, managing keys and permissions, assigning tasks to the right people, and recording the result of every action.
At this point, a young clerk asked: between the restoration master and the dispatch office, who is more senior? The old city lord said the question was off track. The restoration master's scope of work is to enter a specific site and fix a specific problem; the dispatch office's scope of work is to let many roles, many tools, and many entry points collaborate safely over a long period of time.
To renovate an old theater, the dispatch office will not tighten screws for you; to operate a port, no matter how capable the repairer is, he cannot replace the gates, ledgers, keys, dispatch, and tracking system. Both tools can catch complex work, but they live in different sites, so the tasks they catch are naturally different.
Later the old city wrote the rules into the workshop register: when repairing a theater, assign people who can enter blueprints and wall crevices; when managing a port, first build a scheduling foundation that can connect to interfaces, manage permissions, and retain context. Similar names do not matter; what matters is which site it actually serves.