Kernrechtsfrage
Which method must be used to assess invalidity for a self-employed insured person with fluctuating business accounts?
Extrahierter Entscheid
The comparative earnings method could not be relied on because the business results were influenced by external factors; the extraordinary method of assessment was required.
Extrahierte Begründung
Business profits did not reflect the insured's personal earning capacity alone, since an employed qualified mechanic and other external factors affected turnover and profit.