DecisioTool
Forecast Accuracy BASIC Template
Know exactly how accurate your forecasts are — and why they're missing.
Most supply chain teams track forecast accuracy as a single number. This template shows you the full picture: which SKUs are on target, which are consistently over- or under-forecasting, and where to focus your improvement efforts first.
Open it Monday morning, enter your data, and walk into your next S&OP meeting with a clear, defensible view of forecast performance.
What's Inside
- Inputs Sheet — Enter up to 15 SKUs with Forecast Units, Actual Units, and Root Cause notes per period
- Calculations Engine — Auto-calculates MAPE, Forecast Accuracy %, Mean Bias %, and per-SKU APE% using industry-standard formulas
- Dashboard — One-page summary showing overall accuracy, MAPE, Mean Bias, SKUs on target count, and Best/Worst SKU identification with ✓/✗ status indicators
- Root Cause Tracking — Log the reason behind each SKU's miss to identify systemic patterns over time
Key Metrics Calculated Automatically
- MAPE (Mean Absolute Percentage Error) — the industry-standard measure of forecast accuracy
- Forecast Accuracy % — expressed as 1 − MAPE for easy executive reporting
- Mean Bias % — tells you whether you're systematically over- or under-forecasting
- SKUs On Target — count of SKUs meeting your ≤15% APE threshold
- Best & Worst SKU — automatically identified so you know where to focus
Who This Is For
Demand planners, supply chain analysts, S&OP leads, and operations managers who need a fast, structured way to measure and report forecast performance — without building a model from scratch.
How to Use It
- Download the Excel file
- Open in Microsoft Excel or Google Sheets
- Enter your reporting period, product line, and analyst name in the Inputs tab
- Enter your SKU codes, forecast quantities, and actual quantities
- Add a root cause note for any SKU that missed target
- View your Dashboard for a complete accuracy summary — ready to share with leadership
This is the BASIC version — free, no strings attached. It handles up to 15 SKUs for a single period. Looking for multi-period trending, more SKUs, or advanced bias analysis? The PRO version is coming soon.
Format: Microsoft Excel (.xlsx) | Compatible with Google Sheets
SKU Capacity: Up to 15 SKUs per period
Sheets: Inputs, Calculations, Dashboard
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