SAE023
Assign design margins based on measured uncertainty and failure consequence rather than stacking conservative assumptions across every connected brownfield system.
CyberTRIZ analysis · BrownFieldIndustrialProjects contradiction C11-SAE023 · one of 8,235 worked contradictions published by CyberTRIZ.AI
Regulations
Design Margin vs Existing-System Capacity
Business ContextEngineering standards often require appropriate design margins for uncertainty, degradation, operating variability, and future conditions. In brownfield facilities, applying conventional margins to every modified component can exceed the capacity of existing structures, electrical systems, utilities, piping, or supporting infrastructure and trigger extensive additional scope.
Brown Field Industrial Projects TRIZ ResolutionMargins should be assigned according to actual uncertainty and failure consequence rather than accumulated uniformly across interconnected systems. Better measurement, monitoring, operating controls, and localized reinforcement can preserve required reliability without forcing every existing system to accommodate compounded conservative assumptions.
Applicable TRIZ Principles
Principle 3 – Local Quality: applies margin where uncertainty or consequence actually requires it.
Principle 23 – Feedback: uses monitoring and measured performance to reduce dependence on static conservative assumptions.
Principle 35 – Parameter Changes: adjusts operating or design parameters where existing capacity is constrained.
Expected Outcome
Better use of existing system capacity
Reduced unnecessary reinforcement
Preserved engineering reliability
Lower project scope growth
Decision IndicatorsEarly indicators that this contradiction is limiting brownfield project performance include:
Multiple independent design margins accumulate across connected systems.
Existing infrastructure is declared inadequate primarily because of conservative assumptions.
Large reinforcement scope is generated without measuring actual operating loads.
Different disciplines apply overlapping contingency to the same uncertainty.
Available capacity remains unused because actual conditions are poorly characterized.
Monitoring these indicators helps organizations maintain appropriate engineering protection without allowing compounded conservatism to create unnecessary scope.