
We've all felt stupid after spending hours narrowing the problem down to something that should have been corrective maintenance. The trick is to determine what is appropriate corrective maintenance. A specific action is appropriate corrective maintenance if:
Company policy is that the action must be taken before
returning to the customer.
It's likely to cause the problem, easy to do, and is a
maintenance item.
It's a possible cause, a not too difficult maintenance
item, and the problem is intermittent.
Note that corrective maintenance is one of the few weapons we have against
that scourge of troubleshooters, the intermittent problem. Often the only
economical solution is to do all corrective maintenance, then tell the customer
it might be fixed and to observe it for a time.
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