When a test prompts a design change, save a compact snapshot before editing the file. Record the artwork version, the visible setup, the sample label, and the question the next version is meant to answer. A phone photo and a short text note can be enough.

Change one meaningful variable at a time when practical. If the artwork, position, and sample material all change together, the next result may be harder to interpret. Keep uncertain observations labeled as observations rather than conclusions.

This habit creates a readable trail without pretending that a prototype result is a material guarantee. More maker preparation notes are collected at /updates/.

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