Lockout Checklist Marking for Equipment Correspondence Validation
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Solution Overview
Problem
Current lockout procedures face challenges in efficiently validating correspondence between equipment and procedure checklists, leading to increased risks and costs due to confusion and complexity, particularly in multi-operator and multi-equipment scenarios.
Innovation Solution
A system utilizing a procedure checklist printed on a markable support with graphical assemblages and corresponding marking tools allows operators to visually validate the completion of securing procedures by generating markings that match the graphical patterns associated with each equipment or location, ensuring correct execution and identification of secured zones.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If manual processes are used to track and monitor lockout procedures, then implementation and maintenance costs are reduced, but the reliability and accuracy of validating correspondence between equipment and procedure checklist deteriorate
Solution Approach 1:
The patent uses visual copies (graphical assemblages) of equipment identifiers on the procedure checklist that correspond to physical markers on actual equipment. This allows operators to validate correspondence between checklist items and physical equipment through visual matching rather than manual verification, improving reliability while keeping the system simple and low-cost.
Solution Approach 2:
The patent introduces visual markers and graphical assemblages as intermediary elements between the procedure checklist and physical equipment. These intermediaries facilitate accurate matching and validation without requiring complex electronic systems or increasing implementation costs significantly.
2Reliability
If additional energy source cutting means are added close to the zone to be secured, then the reliability of energy isolation is improved, but the device complexity and maintenance costs increase
Solution Approach 1:
The patent segments the lockout procedure into distinct visual validation steps, where each piece of equipment to be isolated has its own specific identifier on the checklist. This allows operators to systematically verify each energy isolation point without adding physical equipment, reducing complexity while maintaining reliability.
Solution Approach 2:
The procedure checklist is prepared in advance with all necessary visual identifiers and correspondence markers before the lockout operation begins. This preliminary preparation ensures that operators can systematically validate each isolation point without needing to add or modify equipment during the procedure.
3Difficulty of detecting and measuring
If light signals are installed to indicate the state of dangerous energy sources, then the ease of detecting energy source status is improved, but the device complexity and installation costs increase
Solution Approach 1:
The patent replaces electronic/detective systems (light signals, sensors) with a visual-matching system using graphical assemblages and physical markers. Operators detect equipment status and correspondence through visual inspection of matched identifiers rather than through electronic signals, eliminating the need for complex electrical circuits while improving detection ease.
Solution Approach 2:
The patent employs visual markers and graphical assemblages that can use color or visual pattern changes to indicate equipment status and correspondence. This provides clear visual detection of energy source isolation status without requiring electronic light signals or complex detection systems.
4Reliability
If the number of pieces of equipment under lockout is increased to improve safety, then the reliability of zone securing is improved, but the loss of time for removing lockout and production delays increase
Solution Approach 1:
The patent segments the lockout procedure into distinct, visually-verifiable steps for each piece of equipment. The procedure checklist is divided into multiple pages or sections, each corresponding to specific equipment or isolation points. This segmentation allows operators to efficiently track and validate each isolation point individually, reducing the time required to systematically remove lockouts while maintaining comprehensive safety coverage.
Data Source
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AI summary
Systems and methods for setting correspondence between pieces of equipment, locations and elements of a lockout procedure checklist comprising a procedure checklist and marking tools. The procedure checklist is printed over a markable support and comprises elements printed thereon each comprising a unique graphical assemblage. Marking tools, provided at locations to perform securing operations on pieces of equipment, are adapted to generate markings on the support matching the graphical assemblages. The operator following each of the elements of the procedure uses the marking tools at the locations to generate markings on the support, and thereby completion of the procedure may be validated by comparing the markings generated on the support with the graphical assemblages thereon. Procedure allows to validate that operations are performed only on appropriate pieces of equipment and location, and that all steps are performed.