What is Odoo MRP?

MRP stands for Manufacturing Resource Planning. It is the core module within Odoo's manufacturing suite, responsible for orchestrating everything that needs to happen to transform raw materials into finished products on time, at the right cost, with the right quality.

At its most basic, Odoo MRP answers three fundamental questions:

• What needs to be produced? (based on sales orders, forecasts or reorder rules)
• When does it need to be produced? (based on delivery dates, lead times and capacity)
• With what will it be produced? (based on Bills of Materials, stock levels and supplier lead times)

The power of Odoo MRP is not in answering these questions in isolation, it is in answering them simultaneously, in real time, across your entire production operation.

The key components of Odoo MRP

Bills of materials (BOM)

The Bill of Materials is the foundation of every production order. It defines exactly which components, in which quantities, are needed to manufacture a product.

Odoo supports:

• Single-level BOMs for simple assemblies
• Multi-level BOMs for complex products with sub-assemblies
• Phantom BOMs for components that are never stocked but always consumed directly in production
• Variant-specific BOMs for products with configurable options

Getting your BOMs right is the single most important step in any MRP implementation. Unreliable BOMs produce unreliable production orders and unreliable production orders produce cost overruns, material shortages and missed deliveries.

See how Xeryon manages over 100,000 product variants with dynamic BOMs in Odoo : Read the Xeryon case study

Work centers and routings

A Work Center is any resource that performs a manufacturing operation a machine, a workstation, a team, an external subcontractor. In Odoo, each work center has a defined capacity, efficiency rate and cost.

A Routing is the sequence of operations required to manufacture a product, assigned to specific work centers with estimated durations. When a manufacturing order is created, Odoo uses the routing to schedule each operation across available work centers, taking capacity constraints into account.

This is what makes Odoo MRP a genuine planning tool, not just a tracking system.

Manufacturing orders

A Manufacturing Order (MO) is the central document in Odoo MRP. It brings together:

• The product to be manufactured and the quantity required
• The BOM to be used
• The routing and work center assignments
• The scheduled start and end dates
• The components to be consumed
• The actual quantities produced and costs incurred

Manufacturing orders can be created manually, generated automatically from sales orders, or triggered by reorder rules when stock falls below a minimum threshold.

The MRP scheduler

The MRP Scheduler is the engine that runs behind all of this. When triggered, it analyses:

• Current stock levels
• Pending sales orders and forecasted demand
• Existing manufacturing orders and their status
• Supplier lead times and open purchase orders
• Reorder rules and safety stock levels

Based on this analysis, it generates replenishment proposals either manufacturing orders or purchase orders with suggested quantities and dates. Your planning team reviews, adjusts and confirms these proposals before execution begins.

How Odoo MRP connects to the rest of your operations

One of the most important aspects of Odoo MRP is that it does not exist in isolation. It is natively integrated with every other module in the Odoo ecosystem.

MRP and inventory

Every manufacturing order automatically reserves the required components from stock. When production begins, component consumption is recorded in real time. When production is completed, the finished product is automatically added to inventory.

No manual stock adjustments. No reconciliation between production and warehouse systems.

MRP and purchasing

When the MRP scheduler identifies a material shortage, it generates a purchase order proposal for the missing components with the correct supplier, quantity, and required delivery date already populated based on your supplier lead times and reorder rules.

Your purchasing team reviews and confirms. The purchase order is sent. When materials arrive, they are received directly into the production reservation.

MRP and sales

Sales orders are the primary demand signal in most manufacturing operations. When a confirmed sales order requires a product that is not in stock, Odoo can automatically trigger a manufacturing order linking the production directly to the customer delivery.

This creates end-to-end traceability from the customer order to the finished product, and allows production planners to prioritize based on real delivery commitments rather than generic forecasts.