How I can choose best system ?

[Hasani]

which parameters affect on system ?
I am working on a offshore platform model in open sees how I can find Umfpack is better or SparseGeneral and whats different between these ?

[Hasani]

Thanks for your conceptual answer, you mean this is Try and Error procedure but how I can find Errors because in my model I try some systems and all of them seems works good !