Plant Alarm Prioritization to Reduce Operator Overload
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Solution Overview
Problem
Process plant operators are overwhelmed by numerous alarms during operational events, making it difficult to distinguish between critical and non-critical notifications, leading to potential consequences of inaction or incorrect responses.
Innovation Solution
A rationalized alarm system that categorizes and prioritizes alarms as Events, Diagnostics, or Alerts, providing operators with actionable information and guiding them on urgency, while disabling auto-reset for Alerts to ensure timely corrective actions, and utilizing a parent-child relationship to manage linked alarms and reduce operator overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all alarms are displayed to operators during plant events, then complete information is provided, but operator overload occurs and critical alarms cannot be distinguished
Solution Approach 1:
The alarm system segments alarms into different categories (process alarms, equipment alarms, safety alarms) and priority levels (high, medium, low). This segmentation allows the system to present only relevant alarm categories to operators during specific plant events, reducing information overload while maintaining completeness of critical information.
Solution Approach 2:
The system applies different display qualities and priorities to different alarms based on their nature and urgency. Critical alarms receive prominent display with high visibility, while non-critical alarms are suppressed or displayed with lower priority. This local differentiation ensures operators focus on critical issues without being overwhelmed by all alarms equally.
2Reliability
If numerous alarms are displayed simultaneously, then all plant conditions are monitored, but critical alarms become indistinguishable from non-critical ones
Solution Approach 1:
The system uses asymmetric display treatment for different alarm types. High-priority alarms are displayed with distinctive visual characteristics (color, size, position) that differ significantly from low-priority alarms. This asymmetric presentation ensures critical alarms stand out and are easily distinguishable from non-critical ones, while all alarms continue to be monitored.
Solution Approach 2:
The system changes display parameters (visibility, priority level, notification method) based on alarm characteristics and plant event context. During certain plant events, non-critical alarms may be suppressed or downgraded in priority, while critical alarms maintain high visibility. This dynamic parameter adjustment maintains monitoring coverage while improving priority differentiation.
3Extent of automation
If auto-reset is enabled for all alarms, then system automation is increased, but timely corrective actions may be delayed for critical alarms
Solution Approach 1:
The system dynamically adjusts the auto-reset function based on alarm priority and plant event context. For high-priority alarms, auto-reset is disabled or restricted to ensure operators take timely corrective actions. For low-priority alarms, auto-reset may be enabled to reduce operator workload. This dynamic control balances automation benefits with the need for timely responses to critical conditions.
Data Source
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AI summary
A system, and method of managing notifications of a plurality of states of a plant of equipment are provided. The alarm system includes a memory device and one or more processors communicatively coupled to the memory device. The one or more processors are programmed to receive parameters relating to a potential alarm, receive an indication of a plant event from at least one of a plurality of field devices, compare the received indication to the received parameters, and display a notification of the potential alarm as at least one of an event, a diagnostic, an alert, and an alarm based on the comparison and in accordance with the received parameters.