A potter does not learn everything about a bowl when it leaves the wheel. A shape that looks balanced while wet may warp in the kiln, and a glaze that seems pale before firing may become dark. She labels each trial with the clay mixture, wall thickness, and firing temperature, then compares the finished object with her intention. Without this return from result to decision, producing more bowls could simply repeat the same hidden mistake. The record turns an unexpected result into information for the next attempt. Yet changing every condition at once would make the record harder to interpret. The potter therefore adjusts a limited feature while keeping enough of the process stable to identify its effect. Improvement emerges from a cycle in which making, observing, and revising remain connected.