Short Shipment (Under-shipment) refers to a state where the actual quantity of finished goods shipped is less than the contractual quantity specified in the Purchase Order (PO) or the final Packing List. It is one of the most critical issues in supply chain management (SCM) within the garment industry. It is primarily confirmed when fabric defects, cutting accidents, or rejects during the sewing process occur and sufficient over-cut (extra buffer) has not been secured to replace them. Physically, it manifests as a discrepancy between the production line input and the final packing output, serving as a direct cause for increased manufacturing costs, loss of buyer trust, and claims. In particular, when it involves a shortage of specific sizes or colors—known as a "Size Broken" phenomenon—it disrupts the retail store's display planning.
From a technical perspective, Short Shipment (Under-shipment) is a phenomenon where the "law of conservation of mass" in the conversion of raw materials to finished goods is eroded by process efficiency and defect rates. Sewing factories generally order 3–5% extra fabric, but for high-functional fabrics or expensive leather materials, this allowance is extremely limited to around 1–2%. At this point, if irreparable rejects occur due to needle cut or puckering caused by tension imbalance during the lockstitch process, it leads immediately to a Short Shipment (Under-shipment).
While the similar concept of "Short-close" refers to the administrative procedure of early termination of an order by agreement with the buyer when the quantity cannot be met during production, Short Shipment (Under-shipment) specifically refers to the physical state of insufficient quantity at the time of shipment. Historically, the garment industry relied on manual counting and paper ledgers, but since the 1990s, the precision of quantity management has risen dramatically with the introduction of ERP (Enterprise Resource Planning) and RFID technology. Nevertheless, because many processes still involve manual labor, Korean factories refer to this as "ppang-ggu" (a hole/gap) and treat it as an emergency; Vietnamese factories identify strict accountability through a "Shortage Report"; and Chinese factories refer to it as "Duanzhuang (短装)" and apply penalty systems, showing variations in response by country.
| Item |
Details |
Remarks |
| Management Category |
Seasonal & Production Management |
Season and production management |
| Related Standards |
ISO 2859-1 (Sampling procedures for inspection by attributes) |
International standard criteria |
| Tolerance |
Generally ±3% ~ 5% (Subject to buyer contract terms) |
Quantity allowance on PO |
| Main Occurrence Stages |
Cutting, Sewing, Final Inspection |
Can occur in all processes |
| Management Tools |
ERP System, RFID Counter, Production Status Board |
Real-time quantity tracking |
| Main Causes |
Fabric Loss, Sewing Defects, Trim Shortage |
Field management variables |
| Reporting Documents |
Shortage Report, Packing List, Commercial Invoice |
Trade and settlement documents |
| Countermeasures |
Back-order, Cancellation, Partial Shipment |
Buyer approval mandatory |
| Financial Impact |
Air Freight Charge, Claim, L/C Discrepancy |
Cost and credit risks |
| SCM Risk |
High (Causes retail stockouts and display disruptions) |
Key SCM management indicator |
- Apparel Manufacturing: Occurs when set quantities cannot be met due to yield calculation errors for specific sizes (e.g., S, XL) or cutting defects. Frequent in outdoor clothing using expensive functional fabrics.
- Bags and Accessories: When the defect rate of trims such as complex metal ornaments or special zippers is higher than expected, the finished product cannot be completed and is processed as a Short Shipment (Under-shipment).
- Footwear Manufacturing: Due to the nature of matching left and right pairs, if a product becomes mismatched due to material defects or sewing errors on one side, it is processed as a Short Shipment (Under-shipment) for that quantity.
- Automotive Interiors: Occurs during the manufacture of seat covers or airbags under strict traceability systems when a lot that fails inspection cannot secure time for replacement production.
- Home Textiles: In the configuration of curtain or bedding sets, cases often occur where the entire set becomes a Short Shipment (Under-shipment) due to a shortage of fabric for a specific component (e.g., pillow covers).
¶ 4. Key Defects and Solutions
-
Symptom: Discrepancy between cutting quantity and final packing quantity
- Root Cause Analysis: Failure to perform a recut after removing fabric defects during the cutting process, or loss of cut pieces.
- Solution: Reconcile the Cutting Report with the line input log in real-time, and ensure an over-cut of 3–5% during cutting to prepare for defects.
-
Symptom: Concentrated shortage of specific sizes/colors (Size Broken)
- Root Cause Analysis: Marker arrangement efficiency errors or insufficient effective width of specific fabric rolls, resulting in an inadequate number of pattern pieces for certain sizes.
- Solution: Re-arrange markers and implement priority loading of the short sizes into the sewing line to meet the shipment deadline.
-
Symptom: Passed quantity falls short after Final Inspection
- Root Cause Analysis: Reject rates due to wrong sewing, fabric damage, or contamination during the sewing process exceed the allowable range.
- Solution: Analyze line-end QC data to identify defect types, and minimize rejects by deploying skilled workers and checking folders/attachments.
-
Symptom: Production halt due to shortage of key trims
- Root Cause Analysis: Inbound quantity of essential trims (zippers, main labels, care labels) is less than the PO, or they are damaged/lost during floor operations.
- Solution: Order an additional 5–10% loss allowance when ordering trims, and strictly implement a 1:1 exchange system for floor defects to control material flow.
-
Symptom: Documentary Short Shipment due to Packing List errors
- Root Cause Analysis: Discrepancy between actual quantity and documented quantity due to errors in entering quantities by carton number or mix-ups.
- Solution: Implement a barcode scanning-based Packing Management System and detect quantity errors through a final weight check before shipment.
-
Symptom: Mass defects in special processes (Printing/Embroidery)
- Root Cause Analysis: Mass disposal occurs at the cut-piece stage due to printing smudges or embroidery displacement.
- Solution: Conduct 100% inspection before entering special processes, specify defect allowance ranges in contracts with subcontractors, and activate an emergency contact network to immediately input replacement fabric if an accident occurs.
¶ 5. Quality Inspection and Management Standards
- Quantity Consistency Inspection: Conduct a 100% check to ensure the actual packing quantity is within the contracted tolerance range (usually ±3%) relative to the PO quantity.
- AQL (Acceptable Quality Level) Linkage: Caution is required as an entire lot may become subject to Short Shipment (Under-shipment) if the lot fails due to defects found during sampling and there is insufficient time for rework.
- Carton Marking Verification: Prevent mis-shipment by visually and instrumentally (scales) inspecting the consistency between the quantity marked on the outer box and the actual internal quantity.
- Partial Shipment Approval Procedure: If a Short Shipment (Under-shipment) occurs, report it immediately to the buyer and obtain written approval (including checking L/C conditions) for partial shipment or short-close.
- Shortage Report Preparation: Record the cause of occurrence (cutting loss, sewing defect, trim shortage, etc.) in detail and clarify accountability to prevent recurrence in future orders.
¶ 6. Setting - Quantity Management and Equipment Optimization
Equipment setting to prevent Short Shipment (Under-shipment) focuses on "precision" to minimize quantity loss due to defects, rather than simply increasing sewing machine speed.
- Activate Counter Function: Enable the 'Production Counter' function in the sewing machine control box.
- Setting Value: Set to count based on the number of thread trimmings per 1 pcs produced.
- Error Prevention: Set 'Double Count Prevention' time to 3–5 seconds to prevent duplicate counts during thread breakage or rework.
- Tension Value Management:
- Based on Towa Digital Tension Gauge: Maintain lockstitch top thread tension at 120–150gf and bobbin tension at 25–35gf. Micro-damage to fabric caused by tension imbalance is rejected during final inspection, causing Short Shipment (Under-shipment).
- Differential Feed Adjustment:
- When producing knit fabrics, set the differential ratio to 1:1.2–1.5 to prevent fabric stretching. If fabric stretches and falls out of size specifications, those quantities are all processed as Short Shipment (Under-shipment).
¶ 6.2. Auto-cutter and Inspection Equipment Setting
- CAM (Computer Aided Manufacturing) Parameters:
- Knife Speed: Adjust to 3,000–4,500 RPM depending on fabric thickness to prevent fabric fusion due to overheating.
- Bite Size: Set to 2.0–3.0mm to minimize interference between patterns.
- Digital Precision Scales (Weight Checker):
- Set standard weight per carton on the packing line (Tolerance ±0.1kg).
- Verification: For certain brands, an automatic conveyor stop system operates if a 0.05kg discrepancy occurs.
- Needle Size Selection Table (By Fabric Thickness):
| Fabric Type | Needle Size (Organ/Schmetz) | Remarks |
|-----------|---------------------------|------|
| Ultra-light (Chiffon) | #7 ~ #9 | Prevent needle holes |
| General Woven (Shirt) | #11 ~ #14 | Standard setting |
| Heavyweight (Denim/Canvas) | #16 ~ #19 | Prevent fabric contamination due to needle breakage |
¶ 6.3. Environmental and Skill Level Differences
- Humidity Management: If factory humidity drops below 40%, static electricity causes fabric adhesion and cutting errors. Maintain 55–65% through a humidification system to increase cutting quantity accuracy.
- Skilled vs. Novice Operators: Skilled operators maintain a consistent backtacking length of 3–4 stitches (based on SPI 10–12) at the start and end of sewing to reduce thread consumption and fabric damage, whereas novices have a 15% higher probability of causing Short Shipment (Under-shipment) by damaging fabric with excessive backtacking.
¶ 7. Factory Slang and Terms
| Language |
Term |
Romanization |
Remarks |
| Korean (KR) |
쇼트 (미달 선적) |
Syoto |
Most frequently used term in the field |
| Korean (KR) |
수량 빵꾸 |
Suryang Ppang-ggu |
Slang meaning a significant quantity shortage causing a shipment emergency |
| Japanese (JP) |
ショート |
Shōto |
Japanese pronunciation of 'Short'; residual term in Korean factories |
| Japanese (JP) |
足りず |
Tarizu |
Japanese field slang meaning insufficient quantity |
| Vietnamese (VN) |
Giao thiếu hàng |
Giao thieu hang |
Official reporting and documentation term for shipment shortage |
| Chinese (CN) |
短装 |
Duǎnzhuāng |
Trade and production management term for shipment quantity shortage |
| English (EN) |
Shortage |
Shortage |
Universally used for production management and material inbound shortages |
| Korean (KR) |
기리까이 |
Girikkai |
The act of urgently replacing/supplementing cut pieces to fill a shortage |
¶ 8. Regional Differences and Field Know-how
- Korea: Due to the "Palli-palli" (hurry-hurry) culture, production speed is emphasized. When a Short Shipment (Under-shipment) occurs, line chiefs show great agility in gathering residual fabric for "Girikkai" (replacement cutting). However, physical processing often precedes documentation, sometimes leading to data discrepancies during final settlement.
- Vietnam: Many large factories are centered around Foreign Direct Investment (FDI), resulting in strong control by IE (Industrial Engineering) departments. Procedures are so strict that line-out is impossible without "Shortage Report" approval when a Short Shipment (Under-shipment) occurs. They place high importance on tolerance negotiations with buyers.
- China: Handling large-scale domestic and export volumes simultaneously, they lead in automated counting systems and ERP integration. However, because penalties for "Duanzhuang (短装)" are very strict for subcontractors, "Short-packing" attempts (faking box quantities) occasionally occur to hide shortages, making weight checks essential during final inspection.
-
Problem: 50pcs short at the final packing stage
- Checklist 1: Re-verify the 'Net Cut' and 'Gross Cut' quantities in the cutting report.
- Checklist 2: Check if any quantity is stuck at subcontracted washing or dyeing plants.
- Checklist 3: Look for semi-finished products left under-table or at rework stations.
- Solution: Immediately notify the buyer of a 'Potential Shortage', check if it is within the tolerance range, and request 'Short-close' approval for the shortage.
-
Problem: 10% Short Shipment occurs only for a specific size (L)
- Cause: A size L pattern was missing during marker output, or size L pieces were cut off due to narrowing fabric roll width.
- Solution: Select rolls with the widest width from the remaining fabric and perform single-ply cutting for size L only to supplement.
-
Problem: 100pcs incomplete due to trim (main label) shortage
- Cause: Failure to perform 100% counting during trim inbound or loss on the sewing line.
- Solution: Immediately check if labels of the same specification can be produced in the local market (buyer approval mandatory), or confirm the quantity as a Short Shipment (Under-shipment) and carry it over to the next shipment.
¶ 10. Equipment and Process Management Guide
- Auto-cutter Optimization: Optimize fabric defect detection sensors to prevent unnecessary fabric loss and increase the accuracy of cut pieces to reduce sewing rejects.
- Digital Counting System: Install digital counters at the sewing line-end and packing tables to link real-time production quantities with the ERP.
- ERP Real-time Monitoring: Enter quantities for each stage (cutting-sewing-packing) in real-time to identify potential Short Shipment (Under-shipment) timing early and establish countermeasures.
- Worker Training: Ensure the fixed quantity per carton (e.g., 12pcs/box) is strictly followed during packing, and strictly prohibit "Short-packing" (arbitrarily adjusting quantities to fill boxes).
- Cut-piece Bundling: Assign bundle numbers after cutting to prevent quantity loss during movement between processes and ensure immediate traceability if loss occurs.
graph TD
A[Confirm PO Quantity] --> B[Calculate Cutting Qty incl. Over-cut]
B --> C[Sewing Line Input]
C --> D[Finished Goods QC Inspection]
D -- Pass --> E[Packing Process]
D -- Defect/Reject --> F{Replacement Qty Available?}
F -- Yes --> C
F -- No --> G[Short Shipment Confirmed]
E --> H[Final Qty Count & Inspection]
H --> I{Matches PO Qty & Tolerance?}
I -- Yes --> J[Proceed with Normal Shipment]
I -- No --> K[Prepare Shortage Report & Request Buyer Approval]
K --> L[Proceed with Partial or Short Shipment]
L --> M[Cancel Balance or Plan Additional Production]
M --> N[Financial Settlement & Claim Processing]
G --> K
- Over-shipment: Shipping more than the ordered quantity, usually done with buyer approval to consume residual fabric.
- Partial Shipment: A method of shipping the total volume in several installments when production is delayed or a Short Shipment (Under-shipment) occurs.
- Yield: The amount of fabric required to make one garment; yield calculation errors are a major cause of Short Shipment (Under-shipment).
- AQL (Acceptable Quality Level): The quality inspection pass threshold; products that do not pass this standard are excluded from the shipment quantity, causing a Short Shipment (Under-shipment).
- Cutting Report: A document recording the number of cut pieces produced relative to the fabric input; it is the basic data for quantity management.
- CBM (Cubic Meter): A unit of shipping volume; Short Shipment (Under-shipment) affects container loading efficiency and freight calculations.
- L/C (Letter of Credit): If 'Partial Shipment Prohibited' is specified in the L/C, even a 1pcs Short Shipment (Under-shipment) becomes a reason for negotiation discrepancy.
- Chargeback: Costs billed to the factory for buyer losses (empty shelf space, increased logistics costs, etc.) caused by a Short Shipment (Under-shipment).
- RFID (Radio Frequency Identification): Technology for real-time tracking of quantities throughout the production and logistics process via chips attached to products.