What quality control is and its role in production
Quality control is a system of actions, methods and procedures for assessing the condition of products, raw materials and processes, and compliance with specified parameters, at every stage of production. It is part of a wider quality management system and can be internal or external (independent).
Objectives of quality control:
- Ensuring that finished products comply with the applicable standards.
- Reducing the likelihood of defects, defective products and deviations.
- Ensuring product safety, durability and reliability.
- Building trust among customers and partners.
- Identifying problems in good time and deciding how to eliminate them.
Quality control is not a one-off exercise but an ongoing production process built into every stage of the product life cycle.
Quality control at each stage of the production cycle
1. Incoming inspection
Carried out before materials and components are used. Inspectors check the documentation and carry out visual inspection, sample-based tests and laboratory tests.
Objectives:
- Checking that raw materials meet the established requirements.
- Taking account of transport and storage conditions.
- Ensuring the safety of subsequent processes.
Methods used: cross-checking certificates, testing samples, measuring parameters, checking markings and examining packaging.
2. In-process inspection
At this stage, process conditions, equipment settings, control points and compliance with the process technology at intermediate stages are monitored.
Key features:
- Automated data collection systems, sensors and checklists are used.
- Nonconformities are recorded and corrective action is taken where needed.
At this stage, potential deviations can be identified and dealt with promptly, which reduces the number of defective finished products.
3. Acceptance inspection
The final check before products are released. It establishes whether the product complies with its technical characteristics, specifications and regulatory documentation.
Procedures:
- Testing, visual inspection, measurements and review of technical reports.
- Use of sampling inspection or 100% inspection.
- Issuing inspection reports, test reports and certificates.
Quality control methods and their classification
Methods fall into the following groups:
- Organoleptic: visual inspection, assessment by touch and by smell.
- Physical and chemical: composition analysis, strength and moisture resistance tests.
- Measurement: precise instrumental measurements, calculation of tolerances and deviations.
- Non-destructive testing: ultrasonic, X-ray and magnetic testing.
- Statistical: trend analysis, calculation of coefficients of variation, batch-by-batch quality assessment.
Independent external quality control: why it is needed and how it works
Third-party inspection by survey companies provides an objective assessment of product quality and of compliance with the contractual terms of supply, free from internal influence.
When it is used:
- For export and import shipments.
- For acceptance of equipment and finished products.
- For certification and assessment of conformity with ISO standards, GOST (Russian national standards) and technical specifications (TU).
Benefits:
- Transparency and legal validity.
- Confidentiality of the information provided.
- Greater trust from customers and financial partners.
Risks when quality control is unreliable
Poor or purely formal control leads to:
- Higher business risks.
- Financial losses from returns of defective products.
- Breaches of contractual obligations.
- Loss of market reputation and reduced competitiveness.
- Penalties imposed by regulatory authorities.
Regulation and standards in Russia
Quality control is governed by:
- Federal Law No. 184-FZ "On Technical Regulation"
- GOST R ISO 9001, ISO 22000, ISO 14001, GOST R 54523
- Regulatory acts of the Ministry of Industry and Trade of the Russian Federation (Minpromtorg), the Federal Agency on Technical Regulation and Metrology (Rosstandart) and the Federal Service for Surveillance on Consumer Rights Protection and Human Wellbeing (Rospotrebnadzor).
- Industry regulations, for example in the food, construction and mechanical engineering industries.
All documents, procedures and reports must comply with the established requirements and be fully completed in electronic or paper form.
How do you set up a reliable quality control system in production?
Steps:
- Developing a quality policy that reflects the specifics of the industry.
- Choosing effective methods adapted to the specific production.
- Automating processes and introducing systems for monitoring and recording deviations.
- Training staff and setting up professional development programmes.
- Implementing a quality management system (QMS) and obtaining ISO certification.
- Working with external auditors and independent inspection bodies.
Best practices in quality control systems
1. Building a multi-level inspection system
A multi-level control system means inspecting products stage by stage: incoming, intermediate (in-process) and acceptance inspection. This approach makes it possible to detect nonconformities early, reduce the number of defective products and cut the cost of reworking or writing off products.
2. Introducing digital monitoring and analytics systems
Digital quality control involves data collection systems, sensors and software for analysing and visualising quality indicators. These tools enable real-time monitoring, making production management more accurate and responsive.
3. Integrating artificial intelligence and machine learning
AI and machine learning make it possible to predict defects, model the consequences of deviations and automatically classify images, sounds and other signals to assess the condition of products or equipment.
4. Applying international standards and certification
Implementing standards such as ISO 9001, ISO 14001, ISO 45001, GMP and HACCP makes the quality management system more effective, processes more transparent and products more competitive.
5. Introducing feedback and continuous improvement systems (Kaizen, PDCA)
These systems involve regularly collecting feedback from employees, customers and auditors, then analysing it and implementing improvements. This makes the control system flexible and responsive to market needs.
6. Training staff and certifying quality control personnel
No control system can work without qualified personnel. Regular training, certification, competence assessments and sharing of experience are essential to maintaining a high level of quality.
In a market where every detail can become a competitive advantage, quality control goes beyond a production necessity and becomes a strategic asset. It brings technology, people and processes together into a single system in which every detail, sample, parameter and decision matters. Companies that rely on transparent, independent and accurate control do more than make products: they build a reputation the market trusts.
