However, given the number of total Nrio proxy points supported under an NrioNetwork, the importance of creating additional tuning policies is generally lower than in other networks. As most tuning policy properties mostly apply to writable proxy points, you should review and understand the default property values, most of which apply to the Nrio points for the I/O outputs (point types VoltageOutputWritable and RelayOutputWritable, for AOs and ROs, respectively).