Odoo's built-in approvals are narrow: the Approvals app covers a fixed set of request types, and beyond that you fall back to manual "state" fields, a lone approver group, or a hard-coded validation button. The moment Finance or Operations needs a real control matrix — "purchase orders over 50,000 need the department manager, then the CFO; anything above 250,000 also needs the CEO; if the manager is on leave it escalates after 48 hours" — native Odoo simply doesn't express it.

The Multi-Level Approvals & Workflow Engine is a build-to-order Odoo module that ECOSIRE designs, develops, installs, and supports for your specific control requirements. It layers a configurable approval and workflow layer on top of ANY Odoo model — sale.order, purchase.order, account.move, hr.expense, stock.picking, project.task, or a custom model you own — without you writing a single line of Python.

At the core is an approval-definition model (models.Model) that lets an administrator define, per target model, an ordered set of stages. Each stage carries an approver rule expressed as a role (an ir.model.access / res.groups mapping or a related field like the record's department manager), a condition domain evaluated against the record, and a mode (sequential or parallel). Computed fields with @api.depends recalculate the required approver set and the live approval status whenever the source document changes, so a purchase order that crosses a threshold automatically pulls in the next tier. Every approval, rejection, delegation, and escalation is written to an immutable approval-history model, giving you a complete, timestamped, per-user audit trail that satisfies internal-control and SOX-style review.

Because ECOSIRE builds this to your rules, the engine is not a black box. We ship the full addon — __manifest__.py, models, views (XML list/form + OWL widgets for the approval timeline), security via ir.model.access.csv and record rules that stop a requester from approving their own document, QWeb approval-certificate reports, and automated actions/server actions that fire the escalation and notification logic. Approval requests reach approvers by email and as in-app Discuss/activity notifications with one-click Approve / Reject / Delegate, and the whole engine is reachable over Odoo's XML-RPC and JSON-RPC API so external systems can submit and query approvals.

The module targets Odoo 17, 18 and 19 and works on both Community and Enterprise (we flag any stage feature that depends on an Enterprise-only app before we build). Typical delivery is one working week depending on how many models and control tiers you need — you receive a working, tested, documented module deployed on your instance, not a template to finish yourself.