Build an A3 for FCR Drift

Site B FCR moved from 1.32 to 1.49 in one month while growth stayed flat and no mortality spike was recorded. A3: current condition -> target -> root cause -> countermeasure -> follow-up evidence The common trap is jumping from the metric to a broad feed cut. That treats the scoreboard instead of the process that produced the score, and it can hide whether biomass, feed delivery, tray timing, or appetite is the real driver. Current condition Stratify FCR by site, pond, cohort, feed type, grading date, tray-reader, and water temperature. The drift is concentrated in Ponds B4 and B5…

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