Sampling inspection concept
Raw materials, equipment, etc. enter the factory, semi-finished products are transferred between the internal processes of the enterprise, and the products are inspected and returned to the factory for inspection. Inspection work is an indispensable and important measure to ensure product quality. According to the number of inspection objects, the inspection can be divided into full inspection and sampling inspection. All inspections are carried out for each product. It is suitable for products that are non-destructive, have few inspection items, are small in quantity, low in cost, and have some quality and quality characteristics. In general, product quality can be guaranteed by full inspection. Sampling inspection is an inspection method for judging whether the maternal quality is qualified by taking the appropriate number of products from the parent of a batch of products as subsamples according to the principle of mathematical statistics. It is suitable for products where the inspection object is destructive and the content of the inspection has an impact on the performance of the product. Although the inspection is non-destructive, the inspection workload is particularly large. In the case that the manpower, material resources, and time are impossible or difficult to achieve, and the total inspection cost is large, sampling inspection is generally used. In the beneficiation plant, the concentrate product is its high-volume continuous production, and therefore usually random checks. Welded Link Chains,Link Chains,Galvanized Chain Yangzhou Jieerte Steel Cable Co., Ltd , https://www.nbjieertesteelcable.com