Fable
The twelve seals left by the missing package
The Seagull Post Office handles over a thousand parcels a day. Counter intake, sorter tagging, warehouse weighing, dock loading, relay station transfer, recipient signing. As long as the parcel arrives, people rarely care where it went in between.
Until one day, a urgently needed box of measuring instruments did not arrive. The sender said it had been handed to the counter, the counter said it had entered the warehouse, the warehouse said it seemed to have been loaded onto the ship, and the boatman said he was not sure whether it was that box. Everyone remembered only the small segment in front of them, and no one could explain the whole route.
The postmaster general initially had everyone check their own records. The counter staff went through the counter's ledgers, the warehouse went through the warehouse's ledgers, and the dock went through the dock's manifests. After a full day of checking, every link claimed it had made no obvious error. The package was still missing.
An old postman said, what we lack is not more ledgers, but a thread that can string the ledgers together. So he gave every parcel a long strip of paper, and every time the parcel passed through a stage, a stamp was added: who took it over, when, what was done, how long it took, whether there was an anomaly, and to whom it was handed.
At first, everyone felt the new system was like unnecessary paperwork. That was until the second package was delayed again. The bureau chief unfolded the long strip of paper and saw that it had stopped at the third post station for six shichen because the weight recheck had failed; after the recheck, it was sent back to the warehouse to be relabeled; the person who relabeled it wrote the destination abbreviation incorrectly, which led to the subsequent misrouting.
This time no one guessed at each other anymore. The entire path was laid out on the table; the delay was not a vague "post office problem," but the result of several specific steps linked together. Why the third station was slow, why the warehouse relabeled, and why the abbreviation was misread could all continue to be traced.
Later, the Seagull Post Office did not only look at the long strips when something went wrong. The postmaster pulled a few each week and found that some routes were always slow, some stations often had to redo work, and some parcels did arrive in the end but took a long detour in between.
The package itself did not become smarter. What became smarter was that the post office could finally see what a thing went through from start to finish. It no longer asked only "Has it arrived?" but could ask "How did it get there, where was it slow, where did it go wrong, and how can it be made more reliable next time?"