Non life insurance return objective

Please shortly state what is Non life insurance return objective? Saw many opposite answers, just want to summarise.

Do not say that it is crediting rate, since according CFAI …Return requirements for casualty companies are not framed in reference to a crediting rate for their policies; rather, casualty insurance portfolios are managed to maximize return on capital and surplus to the extent that prudent asset/liability management, surplus adequacy considerations, and management preferences will allow…