What Is a Final Inspection?
A final inspection — also known as a Pre-Shipment Inspection (PSI) — is a quality control procedure performed when production is at least 80% complete and goods are packed and ready for shipment. It is the most common type of quality inspection in international trade.
The inspector draws a random sample from the finished lot using AQL (Acceptable Quality Level) sampling per ISO 2859-1, then checks the products against the buyer's specifications, approved samples, and applicable standards.
What Gets Checked During Final Inspection?
A thorough final inspection covers multiple quality dimensions:
Visual & Workmanship
- Surface finish, color consistency, and appearance against approved samples
- Assembly quality, stitching (textiles), print quality (packaging)
- Absence of scratches, dents, stains, or cosmetic defects
Dimensions & Measurements
- Product dimensions verified against technical drawings
- Weight checks for compliance with specifications
- Tolerance verification using calibrated instruments
Functionality Testing
- Operation checks (zippers, buttons, switches, mechanisms)
- Performance testing per product category
- Safety checks and regulatory compliance verification
Packaging & Labeling
- Packaging materials, method, and protection adequacy
- Labeling accuracy (product info, barcodes, care labels)
- Barcode scannability verification
- Shipping marks and carton marking compliance
Quantity & Carton Check
- Total quantity count vs. purchase order
- Carton dimensions, weight, and drop test
- Assortment and color ratio verification
AQL Sampling Levels for Final Inspection
AQL (Acceptable Quality Level) defines the maximum acceptable defect rate. The most widely used levels in final inspection are:
| Defect Type | AQL Level | Description |
|---|---|---|
| Critical | 0 (zero tolerance) | Safety hazards, regulatory violations, cannot be shipped |
| Major | 2.5 | Product not functional or saleable, buyer would reject |
| Minor | 4.0 | Cosmetic imperfections, slight deviations from spec |
| Lot Size | Sample Size | Accept (Major 2.5) | Reject (Major 2.5) |
|---|---|---|---|
| 2 – 8 | 2 | 0 | 1 |
| 9 – 15 | 3 | 0 | 1 |
| 16 – 25 | 5 | 0 | 1 |
| 26 – 50 | 8 | 0 | 1 |
| 51 – 90 | 13 | 1 | 2 |
| 91 – 150 | 20 | 1 | 2 |
| 151 – 280 | 32 | 2 | 3 |
| 281 – 500 | 50 | 3 | 4 |
| 501 – 1,200 | 80 | 5 | 6 |
| 1,201 – 3,200 | 125 | 7 | 8 |
| 3,201 – 10,000 | 200 | 10 | 11 |
| 10,001 – 35,000 | 315 | 14 | 15 |
| 35,001 – 150,000 | 500 | 21 | 22 |
The Final Inspection Process: Step by Step
Booking
Client submits inspection request with product specs, PO details, and factory address.
Scheduling
Inspector assigned and scheduled when production reaches 80%+ completion.
On-Site Audit
Inspector arrives at factory, verifies quantity, draws random AQL sample from packed goods.
Testing
Products checked for appearance, dimensions, function, packaging, and labeling.
Report
Detailed report with photos, defect classification, pass/fail result delivered within 24 hours.
Final Inspection vs. Other QC Inspections
| Inspection Type | Timing | Purpose |
|---|---|---|
| Pre-Production (PPI) | Before production starts | Verify raw materials, components, samples |
| During Production (DPI) | 10-15% complete | Catch defects early, verify inline quality |
| Final Inspection (PSI) | 80-100% complete | Verify finished goods before shipment |
| Container Loading (CLS) | During loading | Supervise loading, count, seal verification |
When to Use Final Inspection
Final inspection is recommended in these scenarios:
- New supplier relationships — verify quality before committing to large orders
- High-value orders — protect investment with independent verification
- Complex products — ensure all specifications and tolerances are met
- Regulated industries — verify compliance with safety and regulatory requirements
- Repeat orders — maintain consistency across production runs