Building a Digital Fabric Inspection System with the 4-Point Method

The 4-point system is the most widely accepted method for grading fabric quality, and almost every export buyer references it in their quality agreement. Yet a surprising number of mills still run it on paper: an inspector marks defects on a printed form at the inspection machine, someone tallies the points later, and the grade is recorded in a register that the rest of the business never sees in time to act. A digital fabric inspection system fixes that — not by changing the method, but by capturing it where it happens and connecting it to everything downstream.

How the 4-point system works

Under the 4-point system, each defect is assigned penalty points by its length: small defects up to 3 inches score 1 point, 3 to 6 inches score 2 points, 6 to 9 inches score 3 points, and anything over 9 inches scores 4 points. Holes and major defects typically score the maximum. Points are totalled across the roll and normalised — usually to points per 100 square metres or per 100 square yards — and compared against the acceptance threshold the buyer has set, commonly around 40 points per 100 square metres. Rolls above the threshold are downgraded or rejected.

The method itself is simple. The hard part is doing it consistently across shifts and inspectors, and making the result available fast enough to influence what you ship.

What 'digital' actually adds

A digital fabric inspection system captures each defect at the inspection machine — type, position, and length — and computes the points and the per-100-unit score automatically. That removes the arithmetic errors and the after-the-fact tallying. More importantly, it ties the grade to the specific roll, so finished-goods stock carries its quality grade and a buyer can be shown the inspection record for the exact rolls in their shipment.

It also makes patterns visible. When defect data is captured digitally, you can see that a particular loom produces most of your stains, or that a defect type spikes on a particular shift or yarn lot. Paper forms bury that signal; a digital system surfaces it, which turns inspection from a gate into a feedback loop that actually reduces defects over time.

The business case

Undetected or mis-graded defects leak cost in two directions: rolls that should have been downgraded ship at first-quality prices and come back as claims, and rolls that were fine get over-rejected out of caution. A consistent digital 4-point system narrows both errors. It also shortens the time between inspection and decision, which matters when a borderline lot is holding up a shipment. And it produces the documented quality evidence that buyers increasingly require before they release payment.

Making it part of the bigger system

Fabric inspection is most valuable when it is not an island. If the inspection result lives inside your ERP, the roll's grade flows into inventory, the defect trend flows into production analytics, and the quality record attaches to the sales order automatically. Run as a standalone app, it becomes another data silo to reconcile. Vastra ERP includes 4-point fabric inspection as a native part of its quality module, linked to roll-level inventory and orders — so the grade an inspector records on the floor is the same grade your buyer sees on the documentation. If defect leakage is costing you on claims, a digital inspection system is one of the fastest paybacks in the mill.