Hi Rhynoxas,
Are you able to get a copy of ASHRAE 55, CIBSE TM52, or EN 15251?
I think ASHRAEs would be particularly useful to you.
CIBSEs approach is that PPD <10% equates to ±3K applied to the neutral temperature from the adaptive method. CIBSE then sets exceedance limits to this with hourly, daily, and seasonal criteria (against a warm year weather file).
In general I’d advise you look more at the temperatures than the condition result, a score of 11 sounds like a very high temp. Worth noting the adaptive criteria only apply to a running mean temp of roughly 10-30degC (varies between ASHRAE and CIBSE).
Cheers,
Charlie