Chapter 29. Operating Methods
Human nature will instinctively modify what should be done into what can be done especially if this makes the job easier or keeps the job moving in some way.—Loss Prevention Bulletin, October 2000
29.1. The Alarm Must be False
We all know of occasions when operators have said, “The alarm must be false” and sent for the instrument technician. For example, the high-level alarm on a storage tank operates. The operator knows the tank is empty and ignores the alarm. By the time the technician arrives, the tank is overflowing. Someone has left a valve open and the liquid intended for another tank has flowed into the first one.
Here is an incident where the operator had a good reason for thinking that the alarm was ...
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