Count defects
Classify each observed defect using the inspection standard agreed for the order.
FABRIC TOOLS / QUALITY CONTROL
Four-Point Fabric
Inspection Calculator
Calculate fabric inspection points per 100 square yards and per 100 square metres from recorded defect counts, inspected length and finished width.
QUALITY CONTROL TOOL
Four-Point Fabric Inspection Calculator
Enter the number of defects in each point band, together with the inspected length and finished width. Results are shown per 100 square yards and per 100 square metres.
Inspection result
Within selected limit
- Total penalty points
- 0
- Per 100 square yards
- 0.00
- Per 100 square metres
- 0.00
The default threshold of 40 points per 100 square yards is for reference only. Follow the defect grading, maximum points per yard and acceptance limit agreed by the buyer and supplier.
COMMON SCORING REFERENCE
Typical four-point defect scoring
Measure the greatest dimension of each visible defect. Use these ranges as a working reference, and always follow the buyer-approved inspection specification.
| Greatest defect dimension | Metric reference | Points |
|---|---|---|
| 3 in or less | 75 mm or less | 1 |
| Over 3 in to 6 in | Over 75 to 150 mm | 2 |
| Over 6 in to 9 in | Over 150 to 230 mm | 3 |
| Over 9 in | Over 230 mm | 4 |
Common special cases
- Hole or opening ≤ 1 in
- Commonly 2 points
- Hole or opening > 1 in
- Commonly 4 points
- Continuous running defect > 9 in
- 4 points for each affected yard or metre
- Full-width defect, seam, or width below specification
- Commonly 4 points for the affected yard or metre
Examples include broken ends or picks, slubs, stains, oil marks, bars, holes and weaving faults. Score each defect by its measured size and the agreed inspection rules—not by its name alone.
WORKED EXAMPLE
From defect tally to inspection score.
Assume 120 yards of fabric at a 60-inch finished width has ten 1-point defects, six 2-point defects, four 3-point defects and three 4-point defects.
Example inputs
- Inspected size120 yd × 60 in
- Defect tally(10 × 1) + (6 × 2) + (4 × 3) + (3 × 4)
- Total points46 penalty points
Area-based calculation
- Per 100 yd²46 × 3,600 ÷ (120 × 60) = 23.0
- Per 100 m²46 × 100 ÷ 167.23 = 27.5
How to interpret the result
A lower score generally means fewer penalty points within the inspected area. Compare the result with the acceptance limit in the buyer-approved specification; do not assume that one limit applies to every fabric or order.
HOW TO USE IT
From defect tally to comparable score.
Enter the number of one-, two-, three- and four-point defects, then add the inspected length and finished width. Compare the calculated score with the acceptance limit agreed between buyer and supplier.
Add inspection size
Enter the actual inspected length and finished fabric width in either unit system.
Set the limit
Use the acceptance threshold stated in the approved quality specification.
Record the result
Keep the score together with roll number, defect map and inspection conditions.
IMPORTANT
Use the agreed standard
Is 40 points always the acceptance limit?
No. Forty points per 100 square yards is a common reference, but the applicable limit and defect grading must come from the buyer–supplier agreement.
Does this replace an inspection report?
No. The calculator supports scoring. A complete report should also identify the roll, inspected quantity, defect locations, result and inspector.