Alarm Rationalization via Simulation in Process Control
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Solution Overview
Problem
The proliferation of alarms in industrial process control and automation systems due to advanced monitoring capabilities can overwhelm human operators, leading to important alarms being overlooked, and existing alarm rationalization techniques are skill-dependent and risk suppressing necessary alarms.
Innovation Solution
Implementing a method that uses simulation to evaluate changes in alarm properties by mimicking the operation of industrial process control and automation systems, allowing for the identification and output of simulated alarms, thereby enabling more effective alarm rationalization and reduction of unnecessary alarms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If advanced monitoring capabilities are introduced to monitor a large number of parameters, then the ability to detect important alarms is improved, but the number of alarms generated increases excessively overwhelming operators
Solution Approach 1:
The system performs preliminary analysis of alarm conditions by evaluating multiple criteria (alarm frequency, duration, operational context, inter-alarm intervals) before presenting alarms to operators. This pre-filtering process identifies and suppresses non-critical alarms in advance, allowing the system to maintain high monitoring precision while reducing the volume of alarms reaching operators.
Solution Approach 2:
The patent applies different evaluation criteria and suppression rules to different types of alarms and different operational contexts. By making the alarm suppression characteristics location-specific and condition-specific rather than uniform, the system can maintain high detection capability for critical alarms while suppressing non-critical ones in specific contexts.
2Ease of operation
If alarm rationalization techniques are applied to reduce the number of alarms, then operator workload is reduced, but skill-dependent methods risk suppressing necessary alarms
Solution Approach 1:
The system continuously monitors alarm patterns and operator responses, using this feedback to refine its suppression decisions. By learning from actual operational data and operator behavior, the system improves its ability to distinguish critical from non-critical alarms over time, reducing workload while maintaining reliability without depending on operator skill.
Solution Approach 2:
The patent implements an automated alarm rationalization system that performs suppression decisions independently without requiring human expertise. The system uses predefined criteria and algorithms to automatically evaluate and suppress non-critical alarms, making the alarm management process self-service and eliminating the need for skilled operators to manually rationalize alarms.
3Measurement precision
If multiple criteria are used to evaluate alarm conditions, then the accuracy of identifying critical alarms is improved, but the complexity of the alarm management system increases
Solution Approach 1:
The patent divides the alarm evaluation process into multiple independent criteria (alarm frequency, duration, operational context, inter-alarm intervals), each evaluated separately and then combined. This segmentation allows the system to achieve high identification accuracy through multiple factors while managing complexity by treating each criterion as a separate, manageable evaluation module.
Data Source
AI summary
A method includes obtaining one or more modified properties associated with at least one of an alarm to be generated by an industrial process control and automation system and a process controller within the industrial process control and automation system. The method also includes obtaining historical data associated with actual operation of the control and automation system. The method further includes simulating operation of one or more components of the control and automation system using the one or more modified properties. The method also includes identifying one or more simulated alarms generated during the simulated operation of the one or more components using the one or more modified properties. In addition, the method includes outputting the one or more simulated alarms. The method could also include receiving one or more approvals of the one or more modified properties and providing the one or more modified properties to the process controller.