Uhohraggy,
I am strugging with the same situation and trying to define planned nonconformances. I would think PM not done purposely is definitely a nonconformance but I think it would be a planned nonconformance.
In the supply chain this can happen. For example, if a supplier makes to print but cannot meet a particular feature, they may request a "deviation". When the part arrives it's not going to be to print, but is acceptable. In the case where the supplier made them and submitted them, without prior warning, the parts would be rejected and then a deviation issued.
I often had to deal with design specs which had features/tolerances which couldn't (reasonably) be achieved - good suppliers would flag this at their review of the spec. Others would struggle to make the part, find they didn't and then ship them, hoping for the best...
One is a "planned non-conformity" the other isn't!