Automated Alerting System for Manufacturing Parameter Validation
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Solution Overview
Problem
Human operator errors in manufacturing plants can lead to significant problems, as existing automated control systems lack a function to prevent erroneous operations, posing a risk of accidents despite offering flexibility and assistance.
Innovation Solution
A method and system for automatically generating alerts by creating a proposed current vector from operator entries, comparing it to historical vectors in a database, and alerting individuals when the proposed entry is unusual or risky based on distance and risk measures, thereby preventing potential errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If automated control systems are used to control plant operations, then operational precision and consistency are improved, but the system lacks the ability to prevent erroneous human operations, reducing reliability
Solution Approach 1:
The system implements feedback by continuously monitoring proposed operator entries against historical operational data and alerting operators when entries deviate significantly from normal patterns. The feedback loop compares real-time proposed adjustments with historical vectors to identify potentially erroneous operations before they are executed, thereby preventing errors while maintaining operational precision.
Solution Approach 2:
The patent introduces an intermediary validation system that acts as a mediator between the operator and the automated control system. This intermediary layer analyzes proposed entries using historical data comparison and distance measures, and only allows entries that pass validation or alerts operators of unusual entries. This intermediary prevents erroneous operations from reaching the control system while preserving operator flexibility.
2Adaptability or versatility
If operators are given flexibility to manually adjust set points and limits, then adaptability is improved, but the risk of erroneous operations increases, reducing reliability
Solution Approach 1:
The system applies partial validation by not completely blocking operator flexibility but instead providing selective alerts only when entries are unusually far from historical patterns. The distance measure threshold allows normal flexible operations to proceed while flagging only the most suspicious entries, achieving a balance between adaptability and error prevention.
Solution Approach 2:
The feedback mechanism provides operators with information about the unusual nature of their proposed entries without completely preventing them from making adjustments. Operators receive alerts that prompt reconsideration but retain final decision authority, maintaining adaptability while reducing erroneous operations through informed decision-making.
3Reliability
If all automation functions are switched on to prevent errors, then reliability is improved, but operational flexibility deteriorates, as operators cannot manually adjust parameters when needed
Solution Approach 1:
The system provides self-service validation by automatically comparing operator entries against historical data and generating alerts without requiring additional manual approval steps. The system serves itself by using its own historical data to validate new entries, preventing errors while maintaining operator independence and flexibility to make adjustments when needed.
Solution Approach 2:
The patent changes the parameter of error prevention from a binary on/off state to a continuous spectrum based on distance measures. Instead of completely blocking or allowing all operations, the system adjusts the level of alerting based on how far the proposed entry deviates from historical patterns, maintaining both reliability and flexibility through parameter-based validation.
Data Source
AI summary
A method (400) for automatically checking proposed adjustments by an individual to at least one parameter at a manufacturing plant includes (401) creating a proposed vector including at least one proposed entry from the individual. The proposed vector represents a proposed adjustment to the parameter. A database of historical vectors including the parameter is searched relative to the proposed vector, wherein a number ≧0 of similar stored vectors is identified in the searching based on respective distances (d) relative to the proposed vector (402). If the number ≧1, a distance measure R is calculated from the (d) for the similar stored vector(s) to indicate of how far or close the said proposed vector is to the similar stored vector (403). An alert is provided if the number=0 or R is above a predetermined threshold value (405). The method can be used for validation of proposed production planning parameters or process control parameters.