Answer: (1) Daily inspection. Routine inspections performed by inspectors.
(2) Key inspections. Inspections and adjustments of key items of important equipment are performed weekly, or key inspections are performed when abnormalities are found.
(3) Simple diagnosis. Inspectors use simple instruments to measure the operating status of equipment, as well as perform regular inspections and trend analysis on important equipment.
(4) Precision inspection. Equipment inspection and fault diagnosis are performed by professionals.