Select Inverse Uncertainty Quantification from the UQ study type list to perform a UQ study with inverse uncertainty quantification. You can also specify settings for the surrogate model, MCMC, and experimental data. The settings for the Number of samples and Step size are used for sampling data from posterior distribution of calibration parameters, more details about MCMC are discussed in the Theory section in Inverse Uncertainty Quantification — Markov Chain Monte Carlo. For a full overview of the settings for the Uncertainty Quantification node, see The Uncertainty Quantification Study.