As you are well aware, after developing a metamodel it is essential to check the surrogate model by the goodness-of-fit tests.
Every reliable model shouldn’t suffer from the below problems:
3-Non-normality of errors
Please guide me on how to access goodness-of-fit tests especially the normal probability plot (Q-Q plot) in UQLab to avoid the above-mentioned problems.
Luckily, the Y(meta-model) vs Y(real) is well described in the metamodel examples.