1, quality awareness.
It is the degree of knowledge and understanding of quality and quality work from the leadership decision-making level to every employee of the enterprise, which plays an extremely important role in influencing and restricting quality behavior.
2. Total quality management.
It is a management method that an organization takes quality as the center, takes full participation as the basis, aims at satisfying customers and benefiting all members of the organization and society, and achieves long-term success, including "one process and four stages". A process is that enterprises should complete different tasks at different times, and every production and business activity of enterprises has a process of production, formation, implementation and verification. These four stages are planning and verification.
3. Sampling inspection.
A statistical method and theory to randomly select a small number of products (samples) from a batch of products for inspection, so as to judge whether the batch of products is qualified, including simple random sampling, systematic sampling and stratified sampling. Simple random sampling means that there are n products in a batch of products, and the probability of any n products being sampled is the same. Systematic sampling is sampling in a specified period or in a certain amount.
Every time, it is a method of randomly sampling one or several samples from products or products produced within a certain time interval. Stratified sampling is a sampling method to evaluate the quality of different products with different processing equipment, different operators and different operation methods.
4. Statistical methods of quality inspection.
Including Pareto diagram method, causal analysis diagram method, analytic hierarchy process, etc. Pareto chart is a chart used to rank quality improvement projects from the most important to the least important. Causal analysis diagram, also called fishbone diagram and branching diagram, is a method to study and find out the reasons that affect product quality step by step. Hierarchical method classifies the collected data according to their sources and properties, and groups the data with the same properties and conditions together, thus dividing the whole into several levels and processing them separately.