Odoo's core Manufacturing app tells you what a manufacturing order cost — but it will not tell you why it deviated from your standard, nor split the gap into the buckets your cost accountants actually report on. This build-to-order module closes that gap. ECOSIRE designs, builds, installs, and supports a purpose-built variance engine on top of your existing MRP and Accounting apps, giving plant controllers a per-MO teardown of actual versus standard cost with clean material, labor, machine, overhead, scrap, and rework breakdowns.

This is not an off-the-shelf apps.odoo.com download and there is no instant download. After purchase, our Odoo engineers scope your standard-costing conventions, work-center capacity rates, overhead absorption logic, and chart-of-accounts mapping, then deliver a tested module packaged as a proper Odoo addon (its own __manifest__.py, models, security, views, and QWeb reports) targeting your Odoo 17, 18, or 19 environment — Community or Enterprise. Typical lead time is one working week depending on scope.

Under the hood the module extends mrp.production and mrp.workorder with new stored, computed fields (models.Model fields recomputed via @api.depends on component moves, time logs, and analytic entries) that capture the standard cost frozen at MO confirmation and the rolled-up actual cost at close. A dedicated cost.variance.line model records each variance category so nothing is buried in a single lump figure. Every variance is decomposed the way a cost accountant expects: material price vs. material quantity (usage) variance, labor rate vs. labor efficiency variance, and overhead spending vs. volume variance. Scrap and rework from stock scrap moves and rework operations are captured and costed separately, so waste never silently inflates your good-unit cost.

Security follows Odoo best practice — ir.model.access.csv grants and record rules keep variance data scoped to the right cost-accounting and plant-management groups, so shop-floor users can log time without seeing margin data. Reporting is delivered as pivot/graph views plus a boardroom-ready QWeb PDF variance report by product, work center, and period, and the numbers stay reachable over Odoo's XML-RPC / JSON-RPC API for your BI stack. Optional automated actions (server actions / scheduled ir.cron) can flag any MO breaching a variance threshold and notify the controller via Odoo's messaging.

The result: real-time WIP valuation you can trust, a defensible standard-vs-actual audit trail per order, and variance analytics your finance team can take straight into a margin review — all native inside Odoo, owned by you, and backed by an ECOSIRE support window.