Causal Relationship Display for Production Abnormality Root Cause Analysis
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Solution Overview
Problem
In production facilities, identifying and addressing abnormalities can be delayed due to the need for manual investigation, which slows down the resolution process.
Innovation Solution
A display system that includes a control unit, display unit, and storage unit to visualize causal relationships between components and abnormalities, allowing users to select modes for detailed or grouped views of the causal relationship model, facilitating quicker identification of the root cause of abnormalities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all nodes corresponding to components are displayed in the model diagram, then the detailed causal relationship between components can be checked, but the complexity of the display increases and may reduce visibility
Solution Approach 1:
The patent segments the display content by dividing nodes into multiple tiers based on their causal relationship distance from the abnormality. The first tier contains nodes directly related to the abnormality, the second tier contains nodes with intermediate causal relationships, and the third tier contains nodes with distant causal relationships. This segmentation allows users to focus on critical components while reducing overall display complexity.
Solution Approach 2:
The patent implements dynamic display modes that can switch between showing all nodes and showing only selected tiers of nodes. Users can dynamically adjust the level of detail displayed based on their needs, allowing the system to adapt between comprehensive view and simplified view, thus managing display complexity while preserving detail visibility when needed.
2Loss of information
If the model diagram displays all components, then complete causal relationships are visible, but the time to identify the root cause increases due to information overload
Solution Approach 1:
By segmenting nodes into tiers based on causal relationship strength, the patent enables users to first view only the first tier (most critical nodes) to quickly identify potential root causes. If needed, users can then expand to view second and third tiers for more complete information, thus reducing identification time while preserving information completeness on demand.
Solution Approach 2:
The patent allows users to display only the necessary portion of information (partial action) by showing only relevant tiers rather than all nodes simultaneously. This reduces cognitive load and identification time while maintaining the ability to access complete information when required, effectively applying partial action principle to optimize the balance between speed and completeness.
3Ease of operation
If nodes are grouped into categories, then the overall picture of causal relationships is easier to understand, but detailed component relationships become less visible
Solution Approach 1:
The patent segments the model diagram into multiple tiers where each tier can serve different levels of abstraction. The grouping by tiers provides overall understanding at higher levels, while allowing drill-down to individual component details within each tier, thus resolving the contradiction between overall understanding and detail visibility through hierarchical segmentation.
Solution Approach 2:
The patent adds a hierarchical dimension to the display by organizing nodes into multiple tiers. This vertical dimension allows users to navigate between grouped views (for overall understanding) and detailed views (for component specifics) by moving along the hierarchical dimension, thus maintaining both ease of operation and measurement precision through dimensional organization.
Data Source
AI summary
A display system according to one or more embodiments includes: a control unit; a display unit; and a storage unit. The storage unit is configured to store a causal relationship model representing a relationship between two or more components of the plurality of components and an abnormality that may occur in the production facility, and the control unit is configured to: display, on the display unit, a model diagram that has nodes and one or more edges connecting the nodes to each other, based on the causal relationship model; and in response to a mode selection, such as a request from a user, display the model diagram in either a first mode in which all the nodes are displayed, or a second mode in which the nodes are allocated among a predetermined number of groups based on a predetermined criterion and the groups are displayed as nodes.