I have worked to quantify losses and mortality in Norwegian aquaculture for 15-20 years and developed tools where losses and untapped potential in biological production can be quantified both in volume and economic significance. Furthermore, I have worked with the effect of measures and thus have models that quantify the benefit of optimization. This has also been further developed into cost-benefit models for assessing utility value. The Norwegian aquaculture industry has grown into a large industry, but where optimization of biological production remains. Efficient utilization of resources managed where you get the most back is important in an optimization phase.