A retail chain was losing money on both ends: overstocking slow-moving products and running out of bestsellers. Their ordering was based on gut feeling and basic spreadsheet averages, which couldn't account for seasonality, promotions, or market shifts.
The Solution
I built a machine learning demand forecasting system using Prophet and Python that predicts product demand with high accuracy, weeks in advance.
How it works:
Historical sales data is ingested from the POS system into Supabase
The Prophet model trains on each product category, accounting for seasonality, holidays, and promotional events
Weekly forecasts are generated automatically and pushed to a dashboard
Purchasing teams use the forecasts to optimize order quantities
Key features:
Product-level demand forecasting with weekly granularity
Automatic detection of seasonal patterns and trend shifts
Promotion impact modeling (what happens to demand when you run a sale)
Dashboard with forecast vs. actual tracking
Alert system for anomalous demand spikes or drops
Tech Stack
ML: Prophet, Python
Database: Supabase
Visualization: Custom dashboard
Results
Overstock reduced by 35%
Stockouts reduced by 50%
Inventory carrying costs down 25%
Purchasing team saves 8+ hours per week on manual forecasting
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Posted May 25, 2026
Machine learning demand forecasting system for retail using Prophet and Python, reducing overstock and stockouts through predictive analytics.