Kernrechtsfrage
Whether the cantonal court arbitrarily assessed the expert evidence on the architect's fees
Extrahierter Entscheid
No. The cantonal court could rely on the expert's SIA 102-based calculation and infer the value of full performance without arbitrariness.
Extrahierte Begründung
The expert’s method was coherent; the court was entitled to adopt it and to derive the fee for full performance from the partial-performance calculation. It was also permissible to disregard a hypothetical final amount for a project that was never completed.