This page explains six knitwear-specific quality faults and how to log each one correctly, for anyone who inspects or records a knitwear or sweater order's quality: a quality inspector, a merchandiser, or a new entrant to the trade. This lesson teaches decision flow: once a fault is found, the inspector still has to decide how serious it is and what happens to the piece next.
A quality inspector checking a cut-and-sew T-shirt or a pair of jeans already knows what a broken stitch or an open seam looks like. Knitwear carries its own separate set of faults that either do not exist on a cut-and-sew garment, or show up in a different way, because a knitted garment's fabric and its seams are built differently from a cut-and-sew garment's fabric and seams.
Without knowing these six knitwear-specific faults by name, an inspector logging a sweater batch can either miss a genuine structural fault because it looks unfamiliar, or reject an acceptable garment because a normal wear characteristic looks alarming the first time it is seen. Both mistakes cost the factory money in a different way.
You need: T06-C02-L01 (what makes a knitwear garment different) and T06-C02-L02 (knit gauge, stitch structure and shaping), since this lesson's fault names build on both.
By the end of this lesson you can:
Not covered here: what makes a knitwear garment different from a cut-and-sew garment (lesson T06-C02-L01); knit gauge, stitch structure and shaping (lesson T06-C02-L02); costing a knitwear order (lesson T06-C02-L04); building a complete knitwear order file (lesson T06-C02-L05).
| Term | Meaning |
|---|---|
| Laddering (run) | A knitwear fault where a single dropped stitch unravels vertically down a column of loops, most visible and most likely on finer-gauge knits. |
| Pilling | Small balls of loose fibre forming on a knitted garment's surface from wear friction, most common at underarms and side seams and more likely on coarser or lower-quality yarns. |
| Structural defect | A fabric fault from the weaving or knitting process itself, such as a broken yarn or dropped stitch. |
| Linking (panel assembly) | Joining two fully fashioned knitted panels edge-to-edge, stitch for stitch, at the shoulder, side or sleeve seam, giving a flatter, less bulky join than a sewn seam on woven or cut single-jersey fabric. |
| Rib | A weft-knit structure made on two needle beds, alternating knit and purl columns; stretches and recovers well widthwise and does not curl. |
| Gauge | The number of needles per inch on a knitting machine, describing how fine or coarse the resulting knit is. |
Knitwear carries fault types that either do not exist, or show up differently, on a cut-and-sew garment such as Order A's T-shirt. The six knitwear-specific quality faults are: a dropped stitch/hole, a broken or skipped needle leaving a visible gap; laddering, where one dropped stitch unravels vertically down a column of loops; uneven panel tension, where two panels knitted at different tension settings sit or drape differently once linked; a poor linking seam, a bulky, uneven or partly open join specific to linking rather than sewing; pilling, small fibre balls forming at friction points; and a collapsed or flared rib, a rib trim knitted too loosely to keep its recovery at a cuff or hem. Every fault an inspector finds gets a severity of Minor, Major or Critical, and an action of Accept, Rework or Reject.
| What can differ | The shapes you meet | Why it matters |
|---|---|---|
| Dropped stitch/hole | An immediate, visible gap at the exact point a needle broke or skipped a stitch | Typically Major or Critical since it weakens the fabric structure itself, not only its appearance |
| Laddering (run) | Starts as one dropped stitch but spreads vertically down the column if not caught early, more visible on finer gauges | Severity often depends on how far the run has already spread by the time it is inspected |
| Poor linking seam | A bulky, uneven or partly open join where fully fashioned panels meet, specific to linking rather than sewing | Does not occur on a cut-and-sew garment such as Order A's T-shirt, whose panels are joined by sewing and fail differently, for example broken stitching or puckering |
| Pilling | Small fibre balls at friction points such as underarms and side seams | Often a Minor, Accept-level fault within tolerance, since some pilling is an expected wear characteristic rather than a manufacturing defect |
| Order shape, export or domestic | The same six fault types and the same severity and action logic apply to an export Make to Order batch or a domestic Make to Stock batch alike | Shows the fault-logging method holds regardless of business model or market, as long as the garment is knitwear |
No real, fixed cast order for knitwear or sweaters exists yet in this academy. This lesson reuses the same illustrative sweater order introduced in lesson T06-C02-L01 to demonstrate how each of the six fault types is logged in the Quality Fault Log sheet, explicitly flagged as illustrative rather than a real cast fact. Since Delta Garments' own cut-and-sew line has no fully fashioned knitting machinery, the sweater order is subcontracted to an illustrative knitwear mill, and that mill's own quality inspector works through the illustrative sweater batch panel by panel, checking the front, back, sleeves, cuffs and collar for each of the six named faults, and records what is found against the sheet's own fault type, location, severity and action columns.
This lesson needs no calculation. The worked output is a completed six-row Quality Fault Log, matching each of the six knitwear-specific fault types to a plausible location, severity and action, against the sheet's own example row.
| Fault type | Location | Severity | Action |
|---|---|---|---|
| Dropped stitch/hole | Front panel | Critical | Reject |
| Laddering (run) | Sleeve | Major | Rework |
| Uneven panel tension | Back panel vs front panel | Major | Rework |
| Poor linking seam | Shoulder | Major | Reject |
| Pilling | Underarm | Minor | Accept |
| Collapsed/flared rib | Cuff | Minor | Rework |
A common mistake is treating every visible surface irregularity on a sweater as the same severity of fault. Light pilling at a friction point is a normal, often Accept-level wear characteristic, while a dropped stitch or a poorly linked shoulder seam is a structural defect that will worsen with wear and should usually be Reworked or Rejected. Conflating the two risks either over-rejecting acceptable garments, wasting rework effort on pilling within tolerance, or under-rejecting a genuinely defective garment that later fails in the customer's hands. An inspector who is unsure which group a fault belongs to should default to the first step of the method: identify the fault group before assigning a severity, rather than judging severity from appearance alone.
A sweater can fail an inspection in ways a T-shirt or a pair of jeans cannot, because it is built from loops instead of woven or cut fabric. A single broken loop can travel down the garment. Two panels knitted at slightly different settings can hang differently once joined. The join itself, where two knitted panels meet, is not sewn the way a T-shirt's seam is; it is linked stitch for stitch, and that join can fail in its own way too. Small fibre balls can form where the garment rubs against itself, which is often just normal wear rather than a fault. A cuff or hem trim can lose its grip if it was knitted too loosely. Each of these needs its own decision: how bad is it, and what happens to the garment next. A light fibre ball at the underarm is usually fine to accept. A broken loop is almost never fine to accept as it stands.
The facts in front of the inspector:
The document the inspector reads, the Quality Fault Log sheet's own two open rows:
Should both faults get the same severity and action? Decide before you open the answer.
No. The underarm fuzzing is pilling, a common, often Accept-level wear characteristic within tolerance, especially at a friction point such as the underarm. The dropped stitch is a structural fault that weakens the fabric and should typically be logged as Major or Critical, with a Rework or Reject action.
Two facts, together, decide this. First, pilling forms from ordinary wear friction and is expected on knitwear to some degree, so it is not, by itself, evidence of a manufacturing defect. Second, a dropped stitch is a structural defect at the exact point a needle broke or skipped, and it can spread as laddering if left unrepaired, so it carries a real risk of worsening in the customer's hands.
Logging both the same way would either waste rework effort on an acceptable pilling row, or risk shipping a structurally weak garment carrying the dropped stitch.
This lesson's cost is framed qualitatively, since no separate cost figure for a mislogged knitwear fault is fixed elsewhere in this academy. Mislogging a structural fault such as a dropped stitch or a poor linking seam as low severity risks shipping garments that fail in the customer's hands: a hole widening as the ladder runs further, or a linked seam opening at the shoulder after a few washes.
That risk is not one garment. If the same tension setting, the same linking machine adjustment, or the same needle problem produced the fault, every piece from that run of the batch can carry the same weakness, so the real cost is however many pieces share the same cause, each one a possible return once it reaches the customer. Logging the fault correctly at inspection, before the batch ships, costs only the inspector's time; missing it risks the finished pieces and the buyer's confidence in the factory's own inspection.
Copy this table into the Knitwear order file. Fill each row from an actual inspected fault, not from a guess.
| Column | What it records | Complete (your entry) | Notes |
|---|---|---|---|
| Fault type | One of the six named knitwear-specific faults | Dropped stitch/hole, laddering, uneven panel tension, poor linking seam, pilling, collapsed/flared rib | |
| Location | The garment's own panel name | Front, back, sleeve, cuff or collar | |
| Severity | Minor, Major or Critical | Based on visibility and structural risk, not appearance alone | |
| Action | Accept, Rework or Reject | Some faults, such as light pilling, may reasonably be Accept |
Download the full working sheet from the link on this course's page.
Download the Knitwear order file — Quality Fault Log sheet (Excel)
1. What is laddering, and why is it more visible on finer-gauge knits?
2. Why does a poor linking seam not occur on Order A's cut-and-sew T-shirt?
3. Why might pilling reasonably be logged as Accept while a dropped stitch almost never is?
| EN | AR | FR | TR | Meaning |
|---|---|---|---|---|
| Laddering (run) | نزول العين (السلّم) | Maille filée (échelle) | Kaçık ilmek (merdiven) | A knitwear fault where a single dropped stitch unravels vertically down a column of loops, most visible and most likely on finer-gauge knits. |
| Pilling | التكرّش (البيلينغ) | Boulochage (pilling) | Boncuklanma (pilling) | Small balls of loose fibre forming on a knitted garment's surface from wear friction, most common at underarms and side seams and more likely on coarser or lower-quality yarns. |
| Structural defect | عيب إنشائي | Défaut de structure | Yapısal kusur | A fabric fault from the weaving or knitting process itself, such as a broken yarn or dropped stitch. |
| Linking (panel assembly) | ربط القطع (لينكينغ الأجزاء) | Remaillage des pièces (linking) | Parça birleştirme (linking) | Joining two fully fashioned knitted panels edge-to-edge, stitch for stitch, at the shoulder, side or sleeve seam, giving a flatter, less bulky join than a sewn seam on woven or cut single-jersey fabric. |
| Rib | ريب | Côtes | Ribana | A weft-knit structure made on two needle beds, alternating knit and purl columns; stretches and recovers well widthwise and does not curl. |
| Gauge | الجيج (الغيج) | Jauge (fonture) | Gauge (iğne sıklığı) | The number of needles per inch on a knitting machine, describing how fine or coarse the resulting knit is. |
You now know how to name and log a knitwear order's own six quality faults, with a severity and an action for each. The next lesson costs a knitwear order from yarn to finished garment, building on this course's gauge, shaping and linking terms. Back to the course map