Product quality is very important to personal health and safety, to environmental protection, to the survival of the enterprise, to the interests of consumers, and to social benefits. The responsibility of manufacturers is to provide society and the market with products that meet the requirements of use and comply with laws, regulations, and technical standards. In the complex process of product formation, in order to ensure product quality, manufacturers must inspect and strictly control the goods in each process from product input to realization. Whether the delivered product meets these requirements needs to be confirmed by objective facts and scientific evidence. The quality inspection is the process necessary for the technical identification of the product before the product is completed and delivered for use, and evidence is provided to confirm that the above requirements have been met and that the product can be delivered for use.
What Role Does Inspection Play in Quality Control?
No matter how reasonable the product design is, and no matter how advanced the processing equipment is, unqualified products are always difficult to eliminate; whether it is implementing zero defect management or instilling the concept of total quality management in the entire enterprise, defective products still exist-improving product quality is the enterprise Eternal pursuit. To this end, companies have adopted various methods to fight unyieldingly. Among all these methods, quality inspection is the oldest and of course the most basic method. With the continuous development of inspection technology, quality inspection has been given more Broad and updated content. The following are the main roles that inspection plays in quality control:
Main Function and Benefits of Inspection In Quality Control
- Identification
Identification is the prerequisite for quality inspection to perform other effects in quality control. According to technical standards, product drawings, production (technical) regulations or order contracts, use corresponding detection methods to observe, test, and measure product quality characteristics to determine whether product quality meets the specified requirements. This is the identification function of quality inspection. Identification is the prerequisite for “check-in”, and only through identification can the quality of the product be judged. Without identification, the quality of the product cannot be determined, and it is difficult to achieve quality “check”. Identification is mainly done by full-time inspectors.
- Quality Control
Quality “check” is the most important and basic function of quality inspection. The process of product realization is often a complex process. Various factors that affect quality (workers, machines, materials, regulations, environment) will change and fluctuate in the producing process, and the manufacturing processes (procedures) cannot always be in the same technical state, quality fluctuations exist objectively. Therefore, strict quality inspections must be passed to eliminate and “isolate” unqualified products. In that way, unqualified raw materials will not be put into production, unqualified product components and intermediate products will not be transferred or released, and substandard finished products will not be delivered ( Sales, use), strictly control the quality.
- Preventive Effect
Modern quality inspection is not simply a “quality testing” after production or before leaving the factory, but also plays a preventive role. The preventive effect of inspection is reflected in the following aspects:
- ① It plays a preventive role through the measurement of production process (procedure) capability and the application of control charts. Whether it is measuring process (procedure) capability or using control charts, it is necessary to obtain batch or single set of quality data through product inspection. But the purpose of this inspection is not to determine whether the batch or group of products is qualified, but to calculate the capacity of the production process (procedure) or whether the state of the statistical process is under control. If it is found that the production capacity is not up to the expected standard, or the control chart shows that the process has abnormality (abnormal precursor), timely adjustment or effective technical measures should be taken to improve the production (procedure) capacity or eliminate abnormal factors to restore the process to a stable and controlled state, so as to prevent the occurrence of non-conforming products.
- ② To achieve the preventive effect through the first inspection and patrol inspection of the production process (procedure). When a shift or a batch of products start production (processing), the Initial Production Check should generally be carried out. Only when the first product is qualified and approved can it be officially put into production. In addition, when the equipment is adjusted and the operation (processing) is restarted, the Initial Production Check should also be performed, the purpose of which is to prevent batches of non-conforming products. After the formal production, in order to find out whether the operation process has changed in time, it is necessary to regularly or irregularly visit the operation site for spot inspections (During Production Inspection). Once problems are found, they can be corrected in time. To
- ③ Prevention in a broad sense. In fact, the incoming inspection of raw materials and purchased parts, and the inspection of intermediate products before reordering or warehousing, not only play a role in quality control, but also achieve a preventive effect. The check of the previous process (process) is the prevention of the latter process (process). Especially by applying modern mathematical statistical methods to analyze the test data, the characteristics and laws of quality variation can be found or discovered. Analyzing and using these characteristics and laws can improve product quality and prevent unstable production conditions.
- Quality Report
In order to enable the relevant management department to grasp the quality status in the production process of the product in time, evaluate and analyze the effectiveness of quality control, the data and information obtained in the inspection are summarized, sorted, and analyzed, and then written into a report for quality control, quality improvement, Quality assessment and management’s quality decision-making provide important information and basis.
The main content of the quality report includes:
- ① The quality and qualification rate of raw materials, purchased parts, and outsourcing parts in the acceptance inspection;
- ② The pass rate, repair rate, scrap rate and grade rate of process inspection and finished product inspection, as well as the corresponding amount of waste loss;
- ③ According to the product component (such as parts and components) or the operating unit, the statistical qualification rate, repair rate, scrap rate and corresponding waste loss amount;
- ④ Analysis of the reasons for product scrapping;
- ⑤ Investigation, analysis and handling opinions on major quality issues;
- ⑥ Suggestions for improving product quality.
Through the above functions, quality inspection can help enterprises to better control and manage quality during product production, thereby improving production efficiency, saving costs, improving quality, and innovating products, which is very beneficial to the development of enterprises! So now you should know why you need professional quality inspection service from us!