1, the operator, that is, the person who fills in the operation ticket, checks that the operation tasks and steps are correct and signs at the operator;

2. The guardian shall review the operation ticket and sign it at the guardian's place after it is correct;

3. The long-term value (the person in charge on duty) rechecks the operation ticket signed by the operator and guardian, and signs it at the long-term value (the person in charge on duty) after it is correct.

4. The monitor will submit the signed operation ticket to the long-term value, and the long-term value will arrange the operation time according to the operation task, approve the operation ticket after review and issue the operation ticket.

According to the importance of the task, operators and guardians have different levels of safety technology. Important and complicated operations should be operated by skilled attendants and supervised by the monitor or shift supervisor. Simple operation can inform the long-term value, and batch operation of the long-term value is not required. All units will make clear provisions in their own switching operation procedures.