'Context is everything' as Adrian Leaman says, addressing building performance challenges. Understanding how to capture the context usefully to distill lessons for the future is at the heart of the pragmatic British approach to BPE. See e.g.:
Building Performance Evaluation is an approach present across Europe and supported by the EU research programs. European Building Performance Institute is an example of a pan-European organization dedicated to energy focused reduction of the performance gap.
In different contexts around the world local building performance evaluations are carried using tools tested in an international context (e.g. BUS Survey) and bespoke ones tailored to specific needs.