Inventory run-out planner (Streamlit): reorder within budget

A purchasing manager's spreadsheet answers what runs out, when, and what to reorder on a limited budget. I built a Streamlit planner on real monthly demand for 36 products with synthetic stock data: it forecasts demand, projects stock 12 months ahead with lead times and order minimums, and ranks every reorder within budget with a reason. Five what-if presets show the cost of a tighter budget or a supplier delay, and the forecast shows its own error. Lost sales drop from £560k with no orders to £29k with the plan, 1,160 automated tests. Live demo: https://inventory-runout-planner.streamlit.app Code: https://github.com/modestasgrz/inventory-runout-planner