CST021
Prefabricate dimensionally stable assemblies extensively while retaining adjustable field-fit connection pieces at uncertain interfaces to absorb as-found variation.
CyberTRIZ analysis · BrownFieldIndustrialProjects contradiction C12-CST021 · one of 8,235 worked contradictions published by CyberTRIZ.AI
Regulations
Prefabrication Depth vs Field Fit
Business ContextPrefabrication can reduce site labor, improve quality, and move work outside shutdown windows. Greater prefabrication also increases dependence on accurate existing-condition dimensions, and field discrepancies can make completed assemblies difficult to install.
Brown Field Industrial Projects TRIZ ResolutionPrefabricate stable portions extensively while leaving controlled adjustment at uncertain interfaces. Field-fit sections, adjustable supports, modular joints, and final connection pieces can absorb dimensional variation without sacrificing the benefits of off-site fabrication.
Applicable TRIZ Principles
Principle 1 – Segmentation: separates dimensionally stable assemblies from uncertain interface sections.
Principle 15 – Dynamics: provides adjustment where actual field geometry may vary.
Principle 24 – Intermediary: uses field-fit connection elements between prefabricated and existing systems.
Expected Outcome
Greater off-site fabrication
Reduced shutdown labor
Better installation fit
Lower field rework
Decision IndicatorsEarly indicators that this contradiction is limiting brownfield project performance include:
Prefabricated assemblies require substantial site modification.
Fabrication is delayed until every field dimension is known.
Contractors avoid prefabrication because of interface uncertainty.
Dimensional discrepancies repeatedly affect installation.
Excessive field welding remains inside shutdown windows.
Monitoring these indicators helps organizations maximize prefabrication while retaining sufficient adaptability at uncertain interfaces.