During normal operation, the values of operational variables, such as production rates and safety variables, must stay in a range of pre defined values. Any deviation from the pre defined range indicates a potential problem, that should be reported.
Procedures for process control enable detection of operational risks, in order to alert about them, and fix the problems thereof.
The processed are controlled either directly, by measurements of risk indicators, or indirectly, by measurements of performance indicators
The measurements may be based on either existing or special sensors, and on the definition of value ranges for routine and for emergency operation.
Updated on 20 Dec 2016.