Quality Control (QC)
What Is Quality Control (QC)?
Quality Control (QC) is the process of inspecting, testing, and verifying products to ensure they meet predefined quality standards.
While QA focuses on preventing defects through strong processes, QC focuses on detecting defects in finished goods, semi-finished goods, or production samples.
QC ensures only compliant and safe products reach the market.
Why QC Is Important
QC helps brands:
- Detect defects early in production
- Prevent defective products from entering the market
- Reduce consumer complaints and returns
- Identify issues in raw materials or supplier quality
- Support regulatory compliance across industries
- Maintain consistent product performance
QC directly protects the consumer experience and brand reputation.
Types of QC Activities
1. Physical Inspection
Checking dimensions, weight, fill levels, shape, and structural integrity.
2. Chemical or Material Testing
Ensuring formulation accuracy for food, agro-chemicals, or pharmaceuticals.
3. Packaging Inspection
Verifying seals, caps, labels, and tamper-evidence.
4. Code & Label Verification
Checking secure QR codes, barcodes, batch numbers, and expiry dates.
5. Functional Testing
Testing product performance (electronics, devices, equipment).
6. Sampling & Batch Testing
Inspecting representative samples from production lots
How QC Works in Practice
- Production line generates batches.
- QC team takes samples at designated checkpoints.
- Visual inspection or lab testing is performed.
- Non-compliance results trigger corrective actions.
- Final QC approves or rejects the batch.
- QC data is stored for audits and traceability systems.
QC ensures every batch complies with standards before release.
Example: QC in a Paints & Adhesives Factory
QC verifies:
- Correct viscosity and formulation
- Accurate pigment and color matching
- Secure QR codes printed clearly and scannable
- Packaging integrity and cap seal strength
- No contamination or particulate matter
- Correct batch and shelf-life labeling
Defective batches are rejected or reprocessed.
Difference Between QC and QA (Simplified)
| Aspect | QA | QC |
| Purpose | Prevent defects | Detect defects |
| Focus | Process | Product |
| Timing | Before/during production | After production |
| Responsibility | All teams | QC team specifically |
| Output | SOPs, audits | Test results, inspection reports |
Both QA and QC must work together for total quality.
Benefits of Strong QC
- Improved product safety
- Lower return and complaint rates
- Better supplier accountability
- Enhanced regulatory compliance
- Early detection of manufacturing issues
Stronger brand consistency
How Acviss Supports QC Systems
Acviss enhances QC workflows through:
- Machine Vision QC integrations
- Automated label and Secure QR verification
- Inline printing accuracy checks
- Batch- and unit-level Digital Twin data
- Recall and traceability linkages
- QC anomaly detection and alerts
This strengthens quality control while reducing manual load.
Related Articles
How to Ensure Quality Control in Third-Party Manufacturing at Every Step
The Importance of Quality Control in Manufacturing and How to Implement It
