He said that the PDR data collectors receive formal training ( a 5-6 hour internet class) , and that appraisers might receive no formal inspection training! As if the two plus years under a mentor going on inspections meant nothing. I am presently taking 10 hours of coursework in residential construction for CE, and most appraisers take continuing ed construction or cost approach classes . But a random person with no appraisal license, somehow, incredibly, takes photos where more appraisers report repair issues. The samples I have seen of a PDR report are simple Simon-style with a limited number of photos.