In an industrial process, when the process deviates from its normal situation, alarms are commonly used as warnings or alerts for operators that some actions should be taken immediately to fix the problem. If the root cause is found correctly and tackled promptly, then the process can return to its normal situation. However, if operators cannot identify the real root cause or cannot take right actions to tackle the problem in a short period of time, some terrible consequences may occur, which sometimes brings out accidents or catastrophes. Currently, emergency shot-down systems are always configured for large-scale processes, which serve as the last effort to prevent severe accidents, but it still brings out economic loss because of the unplanned shutdown. Therefore, alarm management is very important and should assist operators recognize the real fault. Ideally, one fault should trigger one exclusive alarm so that the operator can easily obtain accurate information from the alarm. In reality, however, there are too many nuisance alarms including chattering or repeated alarms.