This method allows the estimation of first order and total Sobol’ indices for input variables (alltogether 2p indices, where p is the number of variables) at a total cost of n × p simulations.

In this case, the total cost is 3×999 = 2997 simulations.The resulting analysis is the following:
A. Saltelli, S. Tarantola and K. Chan, 1999, A quantitative, model independent method for global sensitivity analysis of model output, Technometrics, 41, 39–56.
R. I. Cukier, H. B. Levine and K. E. Schuler, 1978, Nonlinear sensitivity analysis of multiparameter model systems. J. Comput. Phys., 26, 1–42.
copy
in “
Promethee_Install_Path/plugins/doe” directory,
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