Frepple

Frepple is an open-source advanced planning and scheduling (APS) solution designed to replace and enhance spreadsheet-based supply chain and production planning. It helps manufacturers and distributors generate realistic, constraint-aware plans that align demand, capacity, inventory, and purchasing in a single integrated environment. The tool’s primary purpose is to provide more accurate, faster, and more transparent planning than manual spreadsheets can deliver, while still remaining flexible and easy to adopt.

Frepple offers demand forecasting, inventory planning, and capacity-constrained production scheduling in one system. Planners can model multi-level bills of material, routings, and work centers, and generate finite-capacity plans that respect material availability, lead times, and resource constraints. The system supports scenario planning and what-if analysis, allowing users to compare alternative plans, evaluate the impact of demand changes, and test capacity or sourcing decisions. Integration options with ERP and other business systems, along with configurable dashboards and reports, give teams a consistent, data-driven view of plan feasibility and performance.