This page explains how to name and log four sock-specific quality faults correctly, for anyone who inspects finished knitted socks: a quality checker, a merchandiser reviewing an inspection report, or a new entrant learning the trade. This lesson teaches a decision skill: once a fault is found, the inspector must name it correctly, judge its severity, and decide the action, since the wrong name sends the fix to the wrong stage of production.
A knitted sock can carry faults a cut-and-sew garment never shows, because a sock is knitted whole on a circular knitting machine and closed by linking, not cut from flat fabric and sewn along several seams. An inspector who has only checked cut-and-sew garments before can meet these for the first time and not know what to call them.
Without a named fault type, an inspection report only says something looks wrong, not what is wrong or which stage should fix it. A sock logged as a "quality issue" gives a quality team no way to tell a knitting fault apart from a linking fault or a packing-stage sorting mistake, so the batch waits while the wrong team explains a fault it did not cause.
You need: T06-C03-L02 (sock anatomy, knitting zones and finishing steps), and it helps to know T03-C05-L02's structural-defect concept, though this lesson restates what it reuses.
By the end of this lesson you can:
Not covered here: what makes hosiery different from cut-and-sew garments (lesson T06-C03-L01); sock anatomy, knitting zones and finishing steps (lesson T06-C03-L02); costing a hosiery order (lesson T06-C03-L04); building a complete hosiery order file (lesson T06-C03-L05).
| Term | Meaning |
|---|---|
| Structural defect | A fabric fault from the weaving or knitting process itself, such as a broken yarn or dropped stitch. |
| Hole/tear | A fabric defect where the material is torn or punctured through. |
| Laddering (run) | A knitwear fault where a single dropped stitch unravels vertically down a column of loops. |
| Welt | A reinforced, more tightly knitted band at the top of a sock's cuff that resists laddering and holds the sock's opening in shape. |
| Dye lot | One batch of fabric or yarn dyed together in the same vat, which can differ slightly in shade from another batch of the same colour. |
| Rework | Fixing a fault in goods already made, instead of scrapping them or accepting them as they are. |
A knitted sock carries four fault types that do not exist on a cut-and-sew garment, because they come specifically from the circular-knitting and linking process, or from the packing stage that follows it. A dropped stitch or hole comes from a broken or skipped needle during knitting, most often visible on the foot or leg. Uneven ribbing tension at the cuff or welt comes from inconsistent machine tension and changes the cuff's grip. Poor toe linking is a bulky or loose seam left by linking done with too coarse a stitch or a skipped stitch. A mismatched pair is two socks from different dye lots, yarn batches or knitting runs packed together as one pair. Each logged fault 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 or hole | A visible gap or hole in the knit, most often on the foot or leg, typically Major or Critical since it affects durability and appearance | Traces back to a broken or skipped needle on the circular knitting machine, not to linking or packing |
| Uneven ribbing tension at the cuff | Loose or tight ribbing that changes the cuff's grip, sometimes corrected by rework such as re-knitting or re-boarding, typically Minor to Major | Traces back to inconsistent knitting-machine tension settings, not to a packing-stage mistake |
| Poor toe linking | A bulky, loose or misaligned toe seam, uncomfortable inside a shoe, typically Major since it is a common cause of customer returns | Traces back to a linking machine's stitch setting or a skipped stitch, a separate process from knitting |
| Mismatched pair | Two socks of different shade or size packed as one pair, typically Major since it reaches the customer as a visibly wrong product | Traces back to a packing-stage sorting mistake, not to either sock's own knitting or linking |
| Export order or domestic order such as a local brand's own Make to Stock batch | The same four fault types and the same naming discipline apply whether the batch ships to an export buyer or to a domestic retailer | Shows the naming rule holds regardless of business model or which market the finished socks ship to |
An inspector on Suez Hosiery's finishing line checks a batch of finished Order C socks, returned from boarding, against the four sock-specific fault types before the batch is cleared for pairing and packing. Order C, ribbed crew socks in a cotton/polyester/elastane blend, 24,000 pairs, is this academy's real, fixed sock order, the same way Order A's T-shirt or Order B's jeans are. The inspector's task is not to decide whether a sock "looks fine"; it is to check each sock against the four named fault types, one at a time, and log any it finds with a specific name, a location, a severity and an action.
This lesson needs no calculation. It uses one batch from Order C, Suez Hosiery's own fixed sock order, and demonstrates recording individual fault instances in the Quality Fault Log's exampleRow, exactly as shown in the workbook.
| Fault type | Location | Severity | Action |
|---|---|---|---|
| Dropped stitch/hole | Foot, mid-sole area | Major | Reject |
| Uneven ribbing tension at cuff | Cuff/top band | Minor | Rework |
| Poor toe linking (bulky seam) | Toe closure | Major | Reject |
| Mismatched pair (shade or size) | Pairing and packing stage | Major | Reject |
A common mistake is logging a knitting-stage fault, such as a dropped stitch or uneven ribbing, under the same vague label as a packing-stage fault, such as a mismatched pair. The two fault families have completely different causes and different corrective teams: a knitting-machine adjustment does not fix a packing-line sorting mistake, and treating them as one undifferentiated "quality issue" sends the correction to the wrong stage of production. A vague label cannot distinguish between the two, so it sends the corrective conversation to whichever team happens to be asked first, not to the team that actually caused the fault, and the batch waits longer than it should.
A knitted sock can go wrong in ways a cut-and-sew garment cannot, because it is knitted whole on a machine and closed by joining stitches at the toe, rather than cut and sewn from flat fabric. A needle can break or skip during knitting, leaving a gap or a hole. The ribbed band at the top can come out too loose or too tight. The seam that closes the toe can end up bulky or badly joined, uncomfortable inside a shoe. Two socks of different shades or sizes can end up packed together as one pair. Each of these is its own separate problem with its own separate cause, so it needs its own separate name when it is written down. Writing "quality issue" instead of naming exactly what went wrong sends the fix to the wrong team and wastes time everyone would rather spend fixing the real cause.
The facts in front of the inspector:
The document the inspector reads, the Quality Fault Log entry as submitted:
Is "quality issue" specific enough to log correctly? Decide before you open the answer.
No. "Quality issue" does not distinguish a mismatched pair, a packing-stage sorting fault, from a knitting-stage fault such as a dropped stitch or uneven ribbing.
Two facts, together, decide this. First, neither sock shows a hole, a ribbing problem, or a toe-seam problem of its own, which rules out the three knitting-and-linking-stage fault types. Second, the only difference found is a shade difference between the two socks once they are paired together, which is exactly how a mismatched pair shows itself.
Since the problem here is two socks of different shades packed together, this is specifically a mismatched-pair fault, and the log should say so, so the corrective action goes to the pairing and packing stage, not to the knitting machines.
This lesson's cost is framed qualitatively, since no separate cost figure for a mislabelled sock fault is fixed elsewhere in this academy. A vaguely logged fault sends the correction to the wrong stage of production, delaying the batch's release toward whatever delivery date it is held against.
If "quality issue" is first sent to the knitting-machine team, and only later, after no cause is found there, sent on to the packing team, the batch loses days it does not need to lose. Worse, if the real cause, here a packing-stage sorting mistake, is never identified, the same fault risks recurring in the next batch, since nothing at the packing stage was corrected. Naming the fault specifically, as a mismatched pair, the first time it is logged, sends the question straight to the pairing and packing stage and avoids both the delay and the risk of repeating the mistake.
Copy this table into the Quality Fault Log sheet. Fill each row with the specific fault type, not a general description.
| Fault type | Location | Severity | Action | Notes |
|---|---|---|---|---|
| Dropped stitch / hole | Trace to a broken or skipped needle during circular knitting | |||
| Uneven ribbing tension at cuff | Trace to inconsistent knitting-machine tension settings | |||
| Poor toe linking (bulky seam) | Trace to the linking machine's stitch setting | |||
| Mismatched pair (shade or size) | Trace to a packing-stage sorting mistake |
Download the full working sheet from the link on this course's page.
Download the Sock order file, Quality Fault Log sheet (Excel)
1. What causes a dropped stitch or hole in a knitted sock?
2. Why is a mismatched pair considered a packing-stage fault rather than a knitting-stage fault?
3. A checker at a different, 8,000-pair sock batch finds a toe seam that feels bulky when the sock is turned right-side out. What fault type should be logged?
| EN | AR | FR | TR | Meaning |
|---|---|---|---|---|
| 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. |
| Hole/tear | ثقب/تمزق | Trou/déchirure | Delik/yırtık | A fabric defect where the material is torn or punctured through. |
| 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. |
| Welt | الويلت (حافة الجورب المقواة) | Bordure renforcée (welt) | Konç lastiği (welt) | A reinforced, more tightly knitted band at the top of a sock's cuff that resists laddering and holds the sock's opening in shape. |
| Dye lot | دفعة الصباغة | Lot de teinture | Boya partisi | One batch of fabric dyed together in the same vat, which can differ slightly in shade or hand-feel from another batch of the same colour. |
| Rework | إعادة التشغيل (تصليح العيب) | Retouche | Yeniden işleme (tamir) | Fixing a fault in goods already made, instead of scrapping them or accepting them as they are. |
You now know how to name and log the four sock-specific quality faults correctly, and why a vague label sends the fix to the wrong stage of production. The next lesson costs Order C, Suez Hosiery's own sock order, using the same live-formula method already fixed for denim, from yarn to finished pair. Back to the course map