I want to select certain features based on their attribute in one field and then calculate a new value in another field. I know I can do this manually with the "Select By Attributes" tool in the attributes table and then calculating the values for the second field. I want to setup a ModelBuilder to automate this so I don't have to do it manually. Is there a way to select features in ModelBuilder without creating an output file? Basically, I want to write a formula that says if Field1 = A, B or C, then calculate Field2 = X; if Field1 = D, E or F, then calculate Field2 = Y; etc.