Most teams hit the same wall as they grow: a purchase order, expense, journal entry, or custom record needs more than one person's blessing before it becomes official, but Odoo's out-of-the-box states only know "draft" and "confirmed." The native activity and approval features cover a few standard documents, and Odoo Studio can bolt on a single approver flag, but neither gives you a configurable ladder of approval tiers with escalation, delegation, amount thresholds, and an auditable trail across arbitrary models. So the rules end up living in email threads and spreadsheets, and "who approved this and when" becomes a monthly reconciliation headache. That is exactly where a typical off-the-shelf apps.odoo.com module also runs out of road: it assumes one document type, one hierarchy, and one company.

Tier-Based Approval Validation is a productized module ECOSIRE builds to your specification. Technically, it introduces an abstract tier.validation mixin that you inherit into any target model — purchase.order, account.move, sale.order, hr.expense, or your own custom models.Model — so that a record cannot leave its pre-approval state until every configured tier has signed off. Tier definitions are stored records that carry a Python or domain-based condition (for example amount_total > 5000), an approver group resolved via res.groups or a computed @api.depends field, a sequence for ordering, and flags for whether approval is required, whether the requester may self-approve, and whether the tier can be delegated. Reviewer assignment, review state, and the full decision history (who, which tier, timestamp, and comment) are persisted in dedicated models so nothing is inferred after the fact. Enforcement is layered: server-side @api.constrains and overridden write/action methods block state transitions in the ORM (so the rule holds over the XML-RPC/JSON-RPC API and scheduled actions too, not just in the UI), while OWL/XML view extensions add validate and reject buttons, a status widget, and a chatter-logged audit note. Optional automated actions and ir.cron jobs handle reminders and time-based escalation to the next tier, and every gate is enforced with ir.model.access.csv plus record rules so approvers only see what they are entitled to.

Because this is build-to-order, we start from your real approval matrix rather than a generic template. After a short scoping call we confirm the target models, the tier ladder and thresholds, the group/hierarchy resolution logic, multi-company boundaries, and any QWeb approval-report or notification requirements, then hand you a fixed quote. We build against your Odoo edition and version (17.0, 18.0, or 19.0; Community and Enterprise differences such as the Enterprise Approvals app are handled explicitly), deliver the packaged module with its __manifest__.py, migrate any existing in-flight records, and validate everything on a staging database before go-live. Typical delivery is one working week from confirmed scope.

Pricing starts from $999 (indicative, single-company base scope); the number of target models, multi-company or multi-hierarchy tier logic, delegation/escalation depth, and localization or data-migration volume increase the quoted scope. You receive a firm fixed quote after the scoping call — never a surprise invoice.