Fable
The old carpenter's two kinds of helpers
An old carpenter has two kinds of helpers. The first are planes, saws, and ink lines: put your hand on them, and they amplify your strength. The second are grown apprentices. The carpenter says, "Fix the east bridge railing by tomorrow morning," and the apprentice measures dimensions, selects timber, asks people to lift beams, and comes back to ask for instructions when encountering bad wood.
The village chief initially called both kinds of helpers "labor-saving things." He bought ten new planes and demanded that the carpenter repair three bridges alone the next day. The planes were sharp, but with no one holding them, the boards still lay in the yard.
The village chief again treated the new apprentice like a moving plane, only instructing him to "go shave wood." The apprentice shaved all night, but the bridge was not repaired, because no one told him the goal, scope, priorities, and acceptance criteria.
In the first fix, the village chief labeled each plane with its purpose: rough plane, fine plane, edge trimmer. The carpenters worked faster, but when the bridge foundation was skewed, the planes couldn't judge whether to stop work or revise the blueprint.
For the second fix, he gave his apprentice a long list of actions. The apprentice followed it and discovered rotten wood hidden under the old railing. The list had no item for this, so he had no choice but to stand by the bridge until dark.
The old carpenter finally made it clear: tools need people to choose and drive them, and are suited to completing well-defined actions; an apprentice takes on a stretch of responsibility and must know the goal, the boundaries, the available tools, when to ask back and how to deliver.
From then on, when the village bought tools it looked at whether they could be conveniently invoked by people; when assigning apprentices it first wrote down the task and responsibility. Both can help; the difference lies in who holds the judgment and who bears the process.
Later, when the village chief made purchases again, he would first ask himself which kind of convenience he was buying. If he just wanted the carpenter to cut faster, he bought good tools; if he wanted the East Bridge repaired, he found someone who could take on the job and gave him materials, authority and acceptance criteria. Tools augment a person's actions; someone who takes on a job undertakes a whole process — this difference determines the entire arrangement. The old carpenter also reminded the village chief that if you treat an apprentice as a tool, you won't give him goals or a channel to ask questions; if you treat a tool as an apprentice, you'll expect it to judge for itself. Many failures are not because the helper is bad, but because the type of helper was misjudged from the start. Later, the village contracts were written more clearly too: buying tools specifies the use, entrusting work specifies the results and responsibilities. This saying was later written into the newcomers' handbook, reminding everyone to look at the on-site cost first before talking about saving effort.