Quality calculator
Calculate DHU (defects per hundred units) from total defects and units inspected, with defects per unit and, if you enter defective units, the defective percentage for comparison.
DHU
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Track DHU by operation and by defect type. A falling total can hide one operation getting worse.
DHU = total defects / units inspected × 100
| Symbol | Meaning | Unit |
|---|---|---|
| D | Total number of defects (a unit can have several) | defects |
| U | Units inspected | pcs |
Defective % = defective units / units inspected × 100
| Symbol | Meaning | Unit |
|---|---|---|
| U_d | Units with at least one defect | pcs |
DHU = total defects / units inspected × 100. Defects per unit = total defects / units inspected. If you enter the number of defective units, the calculator also shows defective percentage = defective units / units inspected × 100.
See DHU for how to use DHU data on the line.
Defaults: 45 defects found in 300 garments, of which 38 garments had at least one defect.
Compare DHU only between results measured at the same check point with the same defect definitions. Record which operation caused each defect so you can act on the biggest sources. The DHU report template tracks both figures by line and day.
Yes. A garment can have several defects, so if units carry more than one defect on average, DHU exceeds 100.
DHU counts every defect. Defective percentage counts each faulty garment once. Both are useful; do not mix them in one report.
DHU counts defects per hundred garments checked. The formula, how it differs from defective percentage, a worked example from end-of-line checking, and how to turn DHU data into action on the line.
Right first time measures the share of garments that pass inspection without any repair. How to calculate RFT, how it relates to DHU and defective percentage, and how it is also used for lab dips, samples and shipments.
Inline inspection checks work at or near each operation while the line is running. How the traffic light system works, how to choose operations to check, sample sizes and frequency, and how to act on the results.
An overview of the sewing defects that cause most repairs and rejections, grouped by stitch, seam and assembly problems, with the usual causes and where to look first.