Traceability management is the earliest food safety management system established and improved by the European Union to deal with the problem of "mad cow disease" from 65438 to 0997. A set of food quality and safety management mechanism based on traceability.

The significance of QR code traceability is the same as that of QR code traceability. The literal meaning of tracing back and tracing back seems to mean tracing back to the source. Two-dimensional code traceability is the process of tracing a product or object by using two-dimensional code. For example, you can trace the production information, processing information, material information, quality and safety information and related qualification information of a product. ?

Classic case:

It is an online education institution-Hao San. Com, which first proposed and officially named this way of thinking as "retrospective method".

During the research and development of educational products, this institution grasped and deeply understood the potential and value of this way of thinking in finding and solving problems in the teaching process, and then applied it to the self-developed intelligent course arrangement system, and formally defined the concept of "traceability method".

Based on the first perceptual evaluation theory, the intelligent course arrangement system aims to quickly test students' academic level and cognitive development level, and customize and promote personalized learning programs. In the selection and design of topics and the judgment and design of cognitive ability level, we can clearly see the application track of traceability principle.