Greetings
The RNP is either defaulted or as per NavData Base, and like all the data in the NavDB, errors can exist such as the wrong RNP, so if your procedure clearly states that the RNP should be XXX and you have ZZZ change the RNP value to XXX.
BRNAV is RNP 5, PRNAV is RNP 1, procedures < 1 i.e., 0.3 (DME/DME)
RNP< 0.3 should be GPS if your aircaft has such a certification.
