Repeatable method
Use the same tool, conditions, reference points, and units when comparing measurements over time.
TOOLS & PROGRESS
WHAT TO COMPARE
Use the same tool, conditions, reference points, and units when comparing measurements over time.
Clear markings, suitable flexibility, rounded edges, and easy cleaning matter for practical use.
Record only what is useful, store it securely, and avoid treating small short-term changes as proof of a lasting outcome.