01Define wearer and garment purpose
Record target population, garment type, silhouette, intended layer, fit description and sales market. Keep body-measurement research separate from finished-garment dimensions. A body chest value and a laid-flat garment chest width are not interchangeable fields.
02Create a point-of-measure map
Assign each measurement a code, name and annotated diagram. Mark exact start and end points, seam inclusion, edge path and whether the value is half or full circumference. Avoid instructions such as normal length or standard width.
03Control garment state and method
State whether buttons or zips are closed, elastic is relaxed, wrinkles are smoothed without stretching and the garment is face up or face down. Record measuring tool, surface, units, decimal precision and rounding.
04Set the base size
Link the base-size table to target body dimensions, intended ease, pattern version and fit sample. Explain design measurements that do not directly follow body size. Do not copy a competitor chart as production evidence.
05Separate tolerance from grading
Tolerance is the accepted production variation around one target; grading changes the target between sizes. Show plus and minus tolerance beside each point and show size-to-size increments in a separate rule or full-size table.
06Test repeatability
Have two trained reviewers measure the same sample independently. Compare results and inspect points with disagreement. Fix diagram, garment state or method wording before widening tolerance to hide a poor instruction.
07Approve and version the spec
Record sample ID, pattern, measurement table, reviewer, approval date and authorized deviations. Issue a new version after fit, construction or wash changes and retire the old active copy from factory and inspection packs.