Even on ECAM equiped planes you may encounter situations that will adress the judgment of the crew in order to solve a multiple failure.
I can give you one other ex for the NG:assume a bleed trip off,which will call for pack trip off on affected side.Then follow this with another failure on the other side,which will affect the other pack,for ex pack trip off,or smoke,or..etc.
You'll have to think out of the box.