主要ポイント
- Forecast at ingredient level, not only at finished-feed level.
- Formulation changes can move ingredient demand faster than production volume does.
- Track forecast error by ingredient to size safety stock rationally.
From production plan to ingredient volume
Multiply planned finished-feed tonnage by current inclusion rates per formula. The weakness is that inclusion rates move with relative ingredient prices, so a purely volume-driven forecast drifts as soon as the formulation team optimises.
Seasonality on both sides
Demand seasonality comes from animal production cycles and climate; supply seasonality comes from harvest and fishing calendars. Overlaying both reveals the months where cover must be built ahead rather than bought on arrival.
Using forecast error deliberately
Measure the historical error per ingredient and use it to size safety stock rather than applying one blanket coverage rule. High-variability, long-lead ingredients need more cover than stable local ones.
確認事項
- Inclusion rates in the forecast match the current approved formulas
- Seasonal supply calendar overlaid on the demand profile
- Forecast error tracked per ingredient and reviewed periodically
管理すべきリスク
- Formulation changes not reflected in procurement volumes
- Uniform safety stock rules leaving critical ingredients exposed
- Demand peaks colliding with origin-side harvest gaps
よくある誤り
- Forecasting only finished feed and back-calculating late
- Ignoring supply-side seasonality in the coverage decision
- Treating the forecast as fixed once the budget is approved
よくある質問
How far ahead should ingredient demand be forecast?
At least the longest procurement lead time plus safety stock coverage for the ingredient concerned; imported materials therefore need a longer horizon than local ones.
What if formulation changes frequently?
Forecast the nutrient requirement as well as the ingredient volume. Nutrient demand is more stable and gives procurement a planning base that survives reformulation.