5.6 Survival Percentage

Use Survival Percentage to review recorded deaths relative to animal exposure over a period. The card defaults to the current month through today and your default Company. It includes only permitted batches marked Is Livestock Item, with Items counted in Nos or Unit. Optional Company, Item, Batch, house, and date filters narrow the scope.

Period survival is 100 × (opening population + animals entering the scope − deaths) / (opening population + animals entering the scope). It combines animal counts rather than averaging batch percentages. Sales and explicitly separate Culling-type issues are departures, not deaths. All issues posted under the Mortality type count as deaths; culling recorded under that same type cannot be distinguished automatically. Internal transfers and valuation-only Repacks net out across the selected scope. Transfers into a selected house count as entrants to that house. The card shows Unavailable for a missing denominator, stock corrections, incomplete batch transformations, unreadable/unclassified stock issues, or invalid negative balances. Its percentage is an operational period rate, not a lifetime cohort survival estimate. Automatic percentage-change statistics are disabled because they are a different metric.

For a stable opening population of 10,000 and 652 classified deaths, survival is 93.48%. Review source classifications before interpreting a difference from closing/opening population.