Analysis / Supply chain and inventory
Backtest inventory demand forecasts
Backtest inventory forecasts using the versions available at planning time, compare error and bias with baselines, and exclude lookahead revisions.
Inventory planner · Operations manager
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Your starting prompt.
Compare [historical forecast versions] with [actual demand] using the version available at each planning date. Calculate error and bias by SKU group, horizon and season, separating zero demand and stockout constrained periods. Contrast the current forecast with simple baselines. Produce a backtest report and policy review candidates; do not evaluate forecasts using revisions created after the demand outcome became known.
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Method and review
Keep the assumptions visible.
Align SKUs, locations, units and dated demand. Show lead-time and service-level assumptions, and flag missing or stale inventory rather than inventing stock availability.
For this task, check
Using revised forecasts after outcomes are known introduces lookahead bias.
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- Bring exports you are allowed to upload, or data your Workspace can already query.
- Choose the reporting period and agree what each record represents.
Work with permitted files or queryable data. Verify the result against the original records.
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