I have used one at a time (OAT) approach in my model for sensitivity analysis. Which gives me elementry effects and variances for the input parameters, helping me to eliminate the less influencial parameters. OAT is a local sensitivity analysis approach.
I now want to use Sobol analysis (global method) in my model on the parameters which I have selected from OAT. Sobol method is a variance based method which will give me the interaction effects in terms of sensitivity indices.
But I am unsure what exactly I will get from Sobol method or how will it be different from OAT method. Hence I want to have a reasoning before using the method. Can we compare both the methods? Can anyone please come up with
- some comparing points between these 2 methods and
- advantages/uses of Sobol method in general?