HAZOP and Safety Integrity Level (SIL studies encourage adding safeguards such as alarms and trip with little consideration for cost or operability of the plant once it is running. This results in processes that cannot be operated without bypassing a large number of the interlocks, and important alarms are lost in the hundreds or thousands of signals assaulting the operator. Many of these bypasses stay on for longer than needed, or perhaps are never turned off.
Risk analysis uses probability and statistics to determine how safely an industrial process will perform. In other words, risk analysis discovers existing probable risk in a process, and how many risk reduction safeguards are required.
The Alberta Energy and Utilities Board established targets for the reduction of flaring solution gas, from the 1996 baseline, in Guide 60, published June 1999. These targets came from recommendations made by the Clean Air Strategic Alliance in June 1998.