1. Y means the inspection is qualified, enter the next process; N means that the test failed to return to a process, and then test.
2. Inspection is responsible for inspection, inspection 1 means incoming inspection; inspection 2 means that the process of inspection; inspection 3, said the final product inspection.
3. ▲ is expressed as outsourcing , according to outsourcing outside the co-control.
4. ● means that the installation is carried out after leaving the factory, control is carried out in accordance with the installation process, and needs to be returned to the production / processing and production process.