I am evaluating the OF equation for my data.
This equation is expressed as OF=√(〖(1-NSE)〗^2+〖(|PBIAS|+0.5)〗^2 ) (Wang, Yen, Liu, & Liu, 2014).
So, my question is if PBIAS must be assessed in percentage or as a number (e g, percentage=100% or number=1).
And, in a perfect fit model, NSE=1 and PBIAS=0, so OF optimum should be 0.5?
Thanks for your help.