Fabric Inspection: The 4-Point System Guide for Garment Factories

We received 800 meters of fabric that looked fine on the outside of the roll. The top layers were perfect — the color was right, the hand feel was correct, no visible defects. We approved it, sent it to cutting, and started working. Two hundred pieces were cut, bundled, and sent to the sewing line before someone on the inspection table noticed something wrong. Three distinct shade bands ran through the middle of the roll, invisible from the outside but obvious once the fabric was spread flat. All 200 pieces were rejected. The fabric supplier said it was our fault for not checking before cutting. He was right.

That single incident cost us about NPR 180,000 — the fabric itself, the cutting labor, the thread wasted on pieces that had already entered sewing, and three days of production delay while we waited for replacement fabric. It was an expensive lesson, but it taught me something that no amount of reading could: fabric inspection is not optional, and doing it properly requires a system.

This guide covers the 4-point system — the most widely used fabric inspection method in the garment industry — and everything you need to implement it in your factory, even if you are a small CMT operation with limited resources.

1. Why Fabric Inspection Matters More Than You Think

Fabric accounts for 60-70% of your garment cost. In a typical CMT operation in Nepal, if you are making a garment that sells for NPR 500, the fabric alone is NPR 300 to 350. Everything else — trims, labor, overhead — is the remaining 30-40%. This means that every fabric defect that makes it past your receiving dock and into the cutting room has a disproportionate impact on your bottom line.

The economics of catching defects early versus catching them late are brutal. Here is what it actually costs at each stage:

The pattern is obvious. The later you catch a fabric defect, the more expensive it becomes. At the inspection stage, it costs you nothing because you send it back to the supplier. By the time it reaches the buyer, you are paying for the full garment plus penalties. This is not theory — I have lived through every single one of these stages.

Most small factories in Nepal skip fabric inspection entirely. The fabric arrives, someone opens one end of the roll, eyeballs it for five seconds, and sends it to cutting. The assumption is that the supplier already checked it. They did not. Or if they did, their standards are not the same as yours. Your buyer does not care whose fault it is — the garment came from your factory, so you pay.

2. The 4-Point System Explained

The 4-point system (also called the AAMA point-grading system, after the American Apparel Manufacturers Association) is the most widely used fabric inspection method in the global garment industry. It is simple, objective, and gives you a single number that tells you whether a roll of fabric is acceptable or not.

The core idea is straightforward: every defect found during inspection is assigned penalty points based on its size. The points are then totaled and converted to a score per 100 square yards of fabric. If the score is below the threshold, the roll passes. If it is above, the roll fails.

Defect Point Assignment

There are two critical rules that people often get wrong:

1. Maximum 4 points per linear yard. Even if a single yard of fabric has five different defects, the maximum penalty for that yard is 4 points. This prevents one badly damaged section from distorting the score for the entire roll.
2. Holes and openings always get 4 points. Regardless of the hole size — even if it is a tiny pinhole — it receives 4 penalty points. A hole cannot be hidden or worked around in garment production.

For width-wise defects (those running across the fabric), the same size-based grading applies. A defect running the full width of the fabric always gets 4 points. For continuous running defects (like a needle line in knits that runs the entire length), you assign 4 points for every yard the defect covers.

3. The Formula: Points Per 100 Square Yards

Once you have inspected a roll and totaled the penalty points, you need to normalize the score so you can compare rolls of different lengths and widths. The standard formula is:

Where does the 3600 come from? It is 100 yards × 36 inches per yard. This converts the denominator (yards × inches) into square yards, and then normalizes to a 100-square-yard basis. Think of it as answering the question: "If I had exactly 100 square yards of this fabric, how many defect points would I expect?"

Worked Example — Roll That Passes

Let us say you inspect a roll with these parameters:

The defects break down as follows:

This roll scores 7.76 points per 100 square yards, which is well within the acceptance threshold. It passes.

Worked Example — Roll That Fails

Now consider a different roll:

This roll scores 35.45 points per 100 square yards. It exceeds the standard 28-point threshold. This roll should be rejected or negotiated with the supplier.

4. Acceptance Criteria: What Score Is Acceptable?

The industry standard acceptance threshold is 28 points or fewer per 100 square yards. This is used by most international buyers, including major US and European brands. Some buyers are more lenient and accept up to 40 points per 100 square yards, particularly for lower-cost garments or for certain fabric types where some level of imperfection is expected (like handloom fabrics or certain natural fiber textiles).

In practice, I recommend setting your internal threshold at 20 points per 100 square yards even if your buyer allows 28. Here is why: the 4-point inspection typically only catches about 60-70% of actual defects. The remaining 30-40% are smaller defects or subtle shade differences that the human eye misses during rapid inspection. If you accept a roll at 25 points, the true defect density is likely closer to 35-40 points. By keeping a tighter internal standard, you build in a safety margin.

5. Types of Fabric Defects You Will Encounter

Knowing what to look for is half the battle. Here are the most common fabric defects organized by origin, because the origin tells you who is responsible and what you can negotiate.

In my experience running a factory in Nepal, the three defects I encounter most frequently are: shade variation (the silent killer — more on this below), needle lines in knits (especially in single jersey from local mills), and broken ends in wovens (common in fabrics from Surat). These three account for roughly 70% of all the defects we find during inspection.

6. How to Set Up Fabric Inspection in Your Factory

You do not need expensive equipment to start. Here is what a practical inspection setup looks like for a small to medium CMT factory.

Equipment Options

For the table method: you need a flat surface at least 1.5 meters wide, a light source underneath or angled behind (a tube light behind a translucent sheet works), and a way to unroll and reroll the fabric at a controlled speed. Two people can do this — one unrolling and one inspecting. It is slow but it works.

Inspection Speed

The standard inspection speed is 15 to 20 meters per minute. Any faster and you will miss defects. Any slower and your inspection person cannot keep up with incoming fabric. At 15 m/min, a 200-meter roll takes about 13-14 minutes to inspect. Including setup, documentation, and roll handling, budget 20 minutes per roll.

If you receive 10 rolls per day, that is about 3.5 hours of inspection work. One person can handle it. If you receive 30 rolls per day, you need a dedicated inspection station with at least two people working in shifts.

What to Record

For each roll, your inspection report should capture:

1. Roll identification — supplier, PO number, roll number, lot number
2. Fabric details — article, composition, width, GSM, color
3. Length verification — actual length vs. supplier-declared length (you will be surprised how often these differ)
4. Defect log — location (meter mark), defect type, size, points assigned
5. Total points and score — calculated per 100 sq yards
6. Pass/Fail decision — with inspector name and date
7. Shade assessment — compared to original swatch

Keep these records. You will need them when negotiating with suppliers, when analyzing which suppliers consistently deliver poor quality, and when a buyer asks for your fabric inspection reports (they will, especially for export orders).

What to Do with Failed Rolls

When a roll fails inspection, you have three options:

• Full rejection — send the entire roll back. This is cleanest but delays production.
• Partial use — mark the defective sections, use the good portions, and claim credit for the defective yardage. This works if defects are concentrated in one section.
• Downgrade — use the fabric for a lower-quality order where the defects are acceptable. Only works if you have such orders running.

In all cases, photograph the defects. Take close-up photos with a ruler for scale, and wide shots showing the defect in context of the fabric roll. A supplier will argue with your words. They cannot argue with a photograph showing a 12-inch crease mark next to a measuring tape.

7. Shade Checking: The Step Most Factories Skip

If I could tell every garment factory owner in Nepal just one thing about fabric quality, it would be this: shade variation causes more garment rejections than all other fabric defects combined. And most factories do not check for it at all.

Shade variation means that different rolls of the "same" fabric are slightly different colors. Roll 1 might be a touch bluer than roll 5. On their own, each roll looks fine. But when you cut pieces from different rolls and sew them into the same garment — or even put garments from different rolls next to each other in a shipment — the difference becomes visible.

The 4-point system does not adequately address shade variation because it is not a point defect — it is a roll-level characteristic. You need a separate shade checking process.

How to Check Shade

1. Get the original swatch from the fabric supplier or buyer. This is your reference. Keep it in a dark, sealed bag — light exposure will fade it over time.
2. Cut a swatch from each roll — at least 6 inches square, from a point at least 2 meters from the roll start (the start often has handling marks that affect color perception).
3. Compare under daylight — use a D65 light source or north-facing daylight. Do not use fluorescent factory lights — they distort color perception. If you cannot afford a proper light box, check near a window with natural daylight between 10 AM and 2 PM.
4. Group rolls by shade — Create groups (A, B, C, etc.) of rolls that match each other. Within each group, the shade should be visually identical.
5. Cut within shade groups — Never mix rolls from different shade groups in the same lay. All pieces in one garment must come from the same shade group.

Within-Roll Shade Variation

Sometimes the shade varies not just between rolls but within the same roll — beginning versus end, or center versus selvedge. This is called within-roll shade variation, and it is particularly common in:

• Reactive-dyed cotton (shade can drift during long batch dyeing)
• Knitted fabrics (tension differences between center and edges)
• Long rolls (500+ meters) where the dye bath was not perfectly consistent

To catch this, compare swatches from the beginning, middle, and end of each roll. If there is visible variation within the roll, mark the transition points and treat the different sections as separate shade groups during cutting.

8. Sample Inspection or 100% Inspection?

If you receive 50 rolls in a shipment, do you need to inspect all 50? The honest answer is: ideally yes, but practically it depends on your supplier relationship and order criticality.

For export orders, I always recommend 100% inspection regardless of the supplier. The cost of one person spending a day inspecting fabric is nothing compared to the cost of a buyer rejection at the garment stage. For domestic orders with a supplier you have used for years, sampling is acceptable — but always check shade on 100% of rolls, even when you are sampling for defects.

9. Negotiating with Fabric Suppliers When You Find Defects

Finding defects is only useful if you can actually do something about it. Here is the negotiation process that works, based on years of dealing with fabric suppliers in India and Nepal.

Step 1: Document Everything

Before you call the supplier, have the following ready:

• Inspection report with roll numbers, defect types, locations, and penalty scores
• Photographs of every defect with a measuring tape for scale
• The original purchase order showing agreed-upon quality standards
• Comparison between declared and actual roll lengths (shortages are common)

Step 2: Know Your Options

Step 3: Set Expectations for Future Orders

After resolving the immediate issue, update your purchase order terms. Include:

• 4-point inspection acceptance threshold (28 points per 100 sq yards, or your buyer's standard)
• Shade tolerance (within 0.5 unit on a grey scale, or specify a Delta E value if you have a spectrophotometer)
• Width and length tolerance (typically +/- 1 inch on width, +/- 2% on length)
• GSM tolerance (typically +/- 5%)
• Who bears the inspection cost and return freight for rejected fabric

The suppliers who push back on these terms are usually the same ones who send you defective fabric. A good supplier welcomes clear standards because it eliminates ambiguity and disputes.

Keep a Supplier Scorecard

Track every supplier's inspection results over time. After 6 months, you will have clear data on who consistently delivers quality and who does not. This data is powerful — both for your own purchasing decisions and for conversations with suppliers who need to improve. When you can show a supplier that their last 10 shipments averaged 32 points per 100 sq yards while your other supplier averaged 12, that is a conversation that drives change.

10. Common Mistakes in Fabric Inspection

After two years of doing this, here are the mistakes I see most often — including ones I made myself:

1. Inspecting too fast. Your person runs the fabric at 30-40 m/min instead of 15-20. They miss half the defects. Slow down. The time cost of thorough inspection is tiny compared to the cost of missing defects.
2. Poor lighting. Inspecting under normal factory lights misses subtle shade variations and small defects. You need at least 1000 lux at the inspection surface, preferably with light both above and below the fabric.
3. Not checking shade. I have said it three times in this article and I will say it again. Shade variation is the number one cause of garment rejections, and most factories do not check it.
4. No records. If you inspect but do not record the results, you lose the ability to negotiate with suppliers and track quality trends. Even a simple paper form is better than nothing.
5. Inspecting only the first few meters. Some factories unroll the first 10 meters, check those, and approve the rest. Defects are often concentrated in the middle or end of the roll, exactly where you are not checking.
6. Ignoring width and length verification. Always measure the actual width at multiple points and the total length. You are paying for what the supplier declares, not what you receive.
7. Not involving the cutting team. Your fabric inspector and your cutting master should communicate. The inspector should mark defect locations on the roll so the cutting team can avoid those sections when spreading.

11. Making It Part of Your Process, Not a One-Time Effort

The factories that succeed with fabric inspection are the ones that make it routine. It should be as automatic as clocking in — fabric arrives, fabric gets inspected, fabric gets shade-grouped, fabric goes to storage, fabric goes to cutting. No shortcuts, no exceptions, no "we will check it later."

Start small. If you are not inspecting at all right now, begin with shade checking only. It takes 5 minutes per roll and catches the single most expensive defect type. Once that is habitual, add the 4-point defect grading. Once that is routine, add width and length verification. Build the process incrementally and it will stick.

The factories in Nepal that inspect fabric systematically are a minority. But they are also the ones that get repeat export orders, negotiate better prices with buyers, and spend less time firefighting quality issues on the sewing floor. The correlation is not a coincidence.

That 800 meters of shaded fabric I mentioned at the start? We never had that problem again. Not because we found a better supplier — we use the same one. But because every single roll now gets shade-checked before it enters the cutting room. The five minutes it takes to cut a swatch and compare it under daylight has saved us from repeating a NPR 180,000 mistake. That is the best return on investment in our entire factory.

Learn more about how Scan ERP handles garment production tracking, fabric management, and factory floor automation for CMT manufacturers.