Measurement Tolerances | NOSK Life

Advanced Technical Reference

Measurement Tolerances

Methods of measurement, control bands, sampling, trend analysis, and corrective action for garment dimensions.

Measurement Tolerances

01

Tolerance Principles

A tolerance is the permitted deviation from the specified finished measurement, not a target for production variation.

The specification remains the production target
Set tolerances by measurement criticality and product function
Use tighter limits for openings, mating parts, and safety dimensions
Account for fabric stretch, shrinkage, thickness, and garment size
Buyer tolerances always override generic guidance
Do not offset one out-of-tolerance point with another point

02

Method of Measurement

Repeatable measurement depends on a precise garment presentation and point-to-point method.

Condition and relax garments before measurement where required
Use a flat, level measurement table and calibrated flexible tape
Fasten closures and align edges according to buyer method
Measure without stretching unless the method specifies extension
Define half, full, straight, curved, and along-seam measurements
Record actual values and signed deviation, not pass/fail alone

03

Typical Control Bands

Common working bands must be confirmed against the approved buyer specification.

Small openings and placements often use ±0.3–0.5 cm
Chest, waist, and hip may use ±1.0–2.0 cm by category and size
Body and sleeve lengths commonly use ±1.0–1.5 cm
Symmetry differences usually require tighter internal control
Stretch products need a defined relaxed and extended method
Critical protective dimensions require product-specific limits

04

Sampling and Trend Control

Measurement auditing should detect drift before a complete lot moves outside tolerance.

Approve pattern, shrinkage, size set, and first output before bulk
Measure all points on initial pieces, then use risk-based checkpoints
Plot high-risk points by hour, line, size, and operator
Escalate trends before values cross the tolerance boundary
Recheck after machine, folder, operator, bundle, or wash change
Keep measurement reports linked to pattern and spec revisions

05

Troubleshooting

Measurement failures often combine pattern, cutting, sewing, relaxation, and washing causes.

Consistent offset: verify pattern and seam allowance
Growing drift: check guides, operator handling, and machine feed
Size-only failure: audit grade rule and nested pattern
Post-wash failure: correct shrinkage allowance and wash process
Asymmetry: review ply alignment, notches, and differential feeding
High variation: standardize garment presentation and inspector method

Apply buyer-specific manuals where requirements are stricter.