Fable
The gardener learned to read the color of the leaves before the tree fell
The orchard north of the city sold saplings to various courtyards. The gardener used to learn of customer dissatisfaction only after the tree died, and then busied himself compensating for the sapling, apologizing and replanting.
As the business expanded, the problems became more complex. Some trees looked alive but bore little fruit; some owners forgot to water them; some courtyards changed stewards, and the newcomers had no idea how the trees should be cared for.
The gardener first had each customer write a reply letter every month. Many found it troublesome, and those truly at risk were often the least likely to reply. A quiet mailbox did not mean the tree was healthy. He then ruled that a fruit tree would only be inspected if it bore no fruit for a year. By then the soil was already ruined, the owner had lost patience, and there was almost no hope of a renewal purchase the next season.
An old farmer suggested watching early signals: leaf color, branches, watering traces, pests and diseases, whether the owner comes to ask questions, whether there was fruit last year, whether other trees have been planted in the yard. Any single signal is unreliable; only together do they resemble a health check report.
The orchard made small tags for each tree. Green tags represented stable results, yellow tags represented low usage or weak relationships, and red tags represented long-term no results, many complaints, or the departure of a key caretaker. The gardener scheduled visits by tag rather than waiting for customers to come angrily to the door.
They soon discovered that healthy does not mean quiet. Some big customers rarely complain, yet the risk is high because no one actually uses the product; some customers have many problems, but each time they are expanding the orchard, so they are worth investing in.
Later, the orchard's renewal rate rose. Not because every tree received identical care, but because the gardener finally knew which tree needed fertilizer, which tree needed new soil, and which tree was no longer suitable for continued promises of a bountiful harvest.
The old farmer said that counting losses after the tree falls is bookkeeping; acting when the leaves change color is management. Later the orchard showed the small cards to customers. Some objected: my tree is not dead, why is it yellow? The gardener pointed out that no one had fertilized it for three months, the new steward had not come to the care class, and no one had picked the fruit. Only then did the customer understand that danger often appears before the relationship breaks down. The health card is not a sentence on the tree, but a reminder for both sides to remedy things while there is still a chance. Later the orchard rechecked the card colors every month. A green card could also turn yellow, and a red card could turn back after care. If the score does not change with conditions on the ground, it becomes just another old account.