totaleffectindices
Totaleffectindices, or total effect indices, are a family of sensitivity measures used in global sensitivity analysis to quantify how much an input variable contributes to the variance of a model’s output, including all its interactions with other inputs. They provide a comprehensive assessment of an input’s influence beyond its isolated, direct effect.
In variance-based sensitivity analysis based on Sobol decomposition, the total effect index for an input i,
Total effect indices are always nonnegative and typically lie between 0 and 1. They satisfy S_Ti ≥
Calculation of S_Ti relies on sampling-based estimators, such as those derived from Saltelli or Jansen methods,