All aquaculture measures read posted records: feedings and mortalities count once posted, because a draft feeding issued nothing and cost nothing.
- Feed quantity — what was fed, summed over posted feeding lines, each feed product in its own unit.
- Feed cost — quantity fed times the unit cost stamped at the moment the feed left the store (the moving-average cost at posting). Feed cost is therefore a real historical figure, not today's price applied to yesterday's feeding.
- Mortality count — fish recorded dead. Mortality biomass puts a weight to the loss: count times each line's average weight of the dead fish.
- Harvested quantity — the harvested batches' live counts at harvest. Harvested biomass — those batches' weight: live count times average weight. Batch cost — everything the harvested batches accumulated: their stocking cost plus all the feed they consumed. Cost per unit of biomass divides batch cost by harvested biomass — the farm's true cost of a kilo of fish.
- FCR — feed conversion ratio: all recorded feed quantity divided by all recorded harvested biomass. It is computed across the feed and harvest figures rather than stored as a measure of its own, because it spans the two; the cockpit reads it over all recorded history.
- One deliberate absence: there is no mortality rate in the analytics. A rate needs a trustworthy denominator, and across batches of different sizes and ages there isn't a governed one. Mortality rate lives where it can be computed honestly — on the batch itself, against its own stocking — and the analytics will not pretend otherwise.