Check and repair the problem in both the supervisor and the worker jointly examine the repair event M/C if it is not an unusual thing to do to prepare a.
Check the repair on the spot in question. Both supervisors and workers jointly determine the conditions for repair M / C if there is something wrong to make the prepare operation.
Check fixed in the points with the problem Both supervisors and workers together to check the conditions of the repair M / C if no abnormalities to prepare a walking machine