The system's reliability is assessed in a number of objective ways, which includes predictions of current strength and responds to changes in form. The system takes into account home advantage, in that the home nation is treated as though it has an extra three rating points, effectively handicapping them, as they will gain fewer ranking points for a win, and lose more should they lose. In the case of a freak result, there is a maximum number of movements on the ranking that any nation can gain from one match.