Which Parameter Really Matters? Uncover the True Impact in Your Model with Sensitivity Analysis

In numerical modeling for geotechnical, structural, or tunneling projects, not all parameters carry the same weight. Some variables directly influence structural behavior or ground response, while others have negligible impact. In a context where efficiency, reliability, and optimization are paramount, knowing which parameters truly matter becomes a strategic and technical advantage. This is precisely the role of Sensitivity Analysis.

Why is it critical to know which parameter matters?

Geotechnical design decisions are based on models built upon laboratory tests, in-situ data, and numerical assumptions. However, resources to test or calibrate every parameter are limited. Sensitivity analysis enables engineers to quickly identify which variables significantly affect model outcomes, helping prioritize investigations, avoid over-design, and streamline future backanalysis campaigns.

Technical methodology

Sensitivity analysis in platforms like DAARWIN is performed by combining numerical models (typically PLAXIS) with high-performance cloud computing. Thousands of simulations are run in parallel, systematically varying model parameters to observe their individual and combined effects. Engineers can define value ranges, correlations, and constraints to tailor the analysis to project-specific conditions.

Results are visualized through sensitivity indices, graphical representations of parameter influence, and comparative plots showing variations in key outputs (settlements, stresses, displacements, etc.).

Key benefits for senior engineers

• Focus calibration efforts on parameters that matter most.

• Reduce uncertainty and increase model reliability.

• Avoid unnecessary overdesign and cost overruns.

• Enhance the technical traceability of decisions.

• Lay the groundwork for efficient, targeted backanalysis.

Practical implementation in DAARWIN

DAARWIN enables integration of real project data with numerical models in a centralized, collaborative platform. Through its parallel cloud-computing engine, users can run multiple sensitivity scenarios simultaneously, drastically reducing processing time and providing intuitive visualization of results.

Sensitivity analysis is no longer a niche technique reserved for complex projects — it is now an essential tool for modern geotechnical engineering. It enhances our understanding of the subsurface, optimizes design resources, and supports technically robust decision-making. For engineers who design, excavate, or manage geotechnical risk, knowing which parameter really matters can make the difference between a lean and a wasteful design.

👉 Interested in trying a sensitivity analysis demo in DAARWIN? Visit: https://www.saalg.com/sensitivity-analysis