Amazon Sales Monitoring & Demand Planning
We automated inventory forecasting and nightly reporting for an Amazon seller—cutting overstock and reclaiming capital tied up in dead stock.

KPIs We Tracked
- Sales Velocity (Units/Day)
- Inventory Turnover Ratio
- Stockout Rate / Days of Cover
- Advertising Cost of Sales (ACoS)
- Total Advertising Cost of Sales (TACoS)
- Customer Return Rate
- Demand Forecast Accuracy (MAPE/WAPE)
- Buy Box Percentage
Technologies Used
- Amazon Selling Partner API
- Amazon Advertising API
- Azure Fabric / Data Lakehouse
- Microsoft Power BI
- Python (Pandas, Scikit-learn, Prophet)
- Inventory Management Software APIs
- Cloud Functions (e.g., Azure Functions)
The Challenge
An Amazon seller was losing margin to stockouts, overstock, and opaque ad spend. Their operation struggled with:
- Inventory Stockouts & Overstocking: Demand swings left shelves empty or capital locked in excess inventory.
- Inefficient Ad Spend: Campaigns ran without clear attribution or profitable keyword focus.
- Manual Forecasting: Spreadsheets couldn't keep up with seasonality and promotions.
- Data Silos: Sales, ads, and inventory lived in separate systems with no single source of truth.
- Dynamic Marketplace: Competitor moves and fee changes required faster decisions than weekly manual pulls allowed.
What We Built
We delivered an integrated analytics and automation platform:
- Automated Data Extraction: Pulled sales, inventory, FBA, advertising, and settlements via Amazon SP-API and Advertising API.
- Centralized Data Hub: Consolidated streams in an Azure Fabric lakehouse with cleaned, analysis-ready models.
- Performance Dashboards: Built Power BI views for sales trends, days of cover, stockout risk, ACoS/TACoS, SKU profitability, and forecasts.
- Demand Forecasting: Deployed time-series models accounting for seasonality, promotions, and ad impact.
- Inventory Optimization: Added reorder alerts and quantity recommendations tied to forecasts and lead times.
- Ad Spend Analysis: Surfaced keyword and campaign ROI so budget moved to what actually converted.
Results
After rollout, the seller delivered:
- 25%+ overstock reduction by aligning inventory to forecasted demand.
- Fewer stockouts from timely reorder signals instead of reactive buying.
- Lower ACoS / TACoS by cutting spend on unprofitable keywords and campaigns.
- Clearer SKU profitability after fees and ads—so weak products got fixed or cut.
- Hours back every week by replacing manual data pulls with overnight reporting.
Tighten Amazon inventory and ad ROI
Book a free audit. We'll show where demand planning and nightly reporting pay back fastest.
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