diff --git a/sale_tier_validation/README.rst b/sale_tier_validation/README.rst
new file mode 100644
index 00000000000..a4f4135e3a8
--- /dev/null
+++ b/sale_tier_validation/README.rst
@@ -0,0 +1,84 @@
+.. image:: https://img.shields.io/badge/license-AGPL--3-blue.png
+   :target: https://www.gnu.org/licenses/agpl
+   :alt: License: AGPL-3
+
+====================
+Sale Tier Validation
+====================
+
+This module extends the functionality of Sale Orders to support a tier
+validation process.
+
+Installation
+============
+
+This module depends on ``base_tier_validation``. You can find it at
+`OCA/server-ux <https://github.com/OCA/server-ux>`_
+
+Configuration
+=============
+
+To configure this module, you need to:
+
+#. Go to *Settings > Technical > Tier Validations > Tier Definition*.
+#. Create as many tiers as you want for Sale Order model.
+
+Usage
+=====
+
+To use this module, you need to:
+
+#. Create a Sale Order triggering at least one "Tier Definition".
+#. Click on *Request Validation* button.
+#. Under the tab *Reviews* have a look to pending reviews and their statuses.
+#. Once all reviews are validated click on *Confirm Order*.
+
+Additional features:
+
+* You can filter the SOs requesting your review through the filter *Needs my
+  Review*.
+* User with rights to confirm the SO (validate all tiers that would
+  be generated) can directly do the operation, this is, there is no need for
+  her/him to request a validation.
+
+.. image:: https://odoo-community.org/website/image/ir.attachment/5784_f2813bd/datas
+   :alt: Try me on Runbot
+   :target: https://runbot.odoo-community.org/runbot/142/11.0
+
+Bug Tracker
+===========
+
+Bugs are tracked on `GitHub Issues
+<https://github.com/OCA/sale-workflow/issues>`_. In case of trouble, please
+check there if your issue has already been reported. If you spotted it first,
+help us smash it by providing detailed and welcomed feedback.
+
+Credits
+=======
+
+Images
+------
+
+* Odoo Community Association: `Icon <https://odoo-community.org/logo.png>`_.
+
+Contributors
+------------
+
+* Mayank Gosai <mgosai@opensourceintegrators.com>
+
+Do not contact contributors directly about support or help with technical issues.
+
+Maintainer
+----------
+
+.. image:: https://odoo-community.org/logo.png
+   :alt: Odoo Community Association
+   :target: https://odoo-community.org
+
+This module is maintained by the OCA.
+
+OCA, or the Odoo Community Association, is a nonprofit organization whose
+mission is to support the collaborative development of Odoo features and
+promote its widespread use.
+
+To contribute to this module, please visit https://odoo-community.org.
diff --git a/sale_tier_validation/__init__.py b/sale_tier_validation/__init__.py
new file mode 100644
index 00000000000..31660d6a965
--- /dev/null
+++ b/sale_tier_validation/__init__.py
@@ -0,0 +1,3 @@
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from . import models
diff --git a/sale_tier_validation/__manifest__.py b/sale_tier_validation/__manifest__.py
new file mode 100644
index 00000000000..33e9074c691
--- /dev/null
+++ b/sale_tier_validation/__manifest__.py
@@ -0,0 +1,21 @@
+# Copyright 2019 Open Source Integrators
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+{
+    "name": "Sale Tier Validation",
+    "summary": "Extends the functionality of Sale Orders to "
+               "support a tier validation process.",
+    "version": "12.0.1.0.0",
+    "category": "Sale",
+    "website": "https://github.com/OCA/sale-workflow",
+    "author": "Open Source Integrators, Odoo Community Association (OCA)",
+    "license": "AGPL-3",
+    "application": False,
+    "installable": True,
+    "depends": [
+        "sale",
+        "base_tier_validation",
+    ],
+    "data": [
+        "views/sale_order_view.xml",
+    ],
+}
diff --git a/sale_tier_validation/i18n/es.po b/sale_tier_validation/i18n/es.po
new file mode 100644
index 00000000000..4e4cac85893
--- /dev/null
+++ b/sale_tier_validation/i18n/es.po
@@ -0,0 +1,91 @@
+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+# 	* sale_tier_validation
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 12.0\n"
+"Report-Msgid-Bugs-To: \n"
+"SO-Revision-Date: 2019-05-08 12:03+0000\n"
+"Last-Translator: Enric Tobella <etobella@creublanca.es>\n"
+"Language-Team: none\n"
+"Language: es\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: nplurals=2; plural=n != 1;\n"
+"X-Generator: Weblate 3.5.1\n"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid ""
+"<i class=\"fa fa-info-circle\"/>This SO needs to be\n"
+"                        validated."
+msgstr ""
+"<i class=\"fa fa-info-circle\"/>Esta SO debe ser\n"
+"                        validada."
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "<i class=\"fa fa-thumbs-down\"/> Operation has been <b>rejected</b>."
+msgstr "<i class=\"fa fa-thumbs-down\"/>La operación ha sido <b>rechazada</b>."
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "<i class=\"fa fa-thumbs-up\"/> Operation has been <b>validated</b>!"
+msgstr "<i class=\"fa fa-thumbs-up\"/>La operación ha sido <b>validada</b>!"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "My sales to review"
+msgstr "Mis Compras a revisar"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "Needs my Review"
+msgstr "Necesita mi Revisión"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "SOs validated and ready to be confirmed"
+msgstr "SOs validadas y preparadas para ser confirmadas"
+
+#. module: sale_tier_validation
+#: model:ir.model,name:sale_tier_validation.model_sale_order
+msgid "sale Order"
+msgstr "Orden de Compra"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Reject"
+msgstr "Rechazar"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Request Validation"
+msgstr "Solicitar Validación"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Restart Validation"
+msgstr "Reiniciar Validación"
+
+#. module: sale_tier_validation
+#: model:ir.model,name:sale_tier_validation.model_tier_definition
+#, fuzzy
+#| msgid "tier.definition"
+msgid "Tier Definition"
+msgstr "tier.definition"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Validate"
+msgstr "Validar"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "Validated"
+msgstr "Validada"
+
+#~ msgid "Reviews"
+#~ msgstr "Revisiones"
diff --git a/sale_tier_validation/i18n/sale_tier_validation.pot b/sale_tier_validation/i18n/sale_tier_validation.pot
new file mode 100644
index 00000000000..2bab776ffd4
--- /dev/null
+++ b/sale_tier_validation/i18n/sale_tier_validation.pot
@@ -0,0 +1,81 @@
+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+#	* sale_tier_validation
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 12.0\n"
+"Report-Msgid-Bugs-To: \n"
+"Last-Translator: <>\n"
+"Language-Team: \n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: \n"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "<i class=\"fa fa-info-circle\"/>This SO needs to be\n"
+"                        validated."
+msgstr ""
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "<i class=\"fa fa-thumbs-down\"/> Operation has been <b>rejected</b>."
+msgstr ""
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "<i class=\"fa fa-thumbs-up\"/> Operation has been <b>validated</b>!"
+msgstr ""
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "My Purchases to review"
+msgstr ""
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "Needs my Review"
+msgstr ""
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "SOs validated and ready to be confirmed"
+msgstr ""
+
+#. module: sale_tier_validation
+#: model:ir.model,name:sale_tier_validation.model_sale_order
+msgid "Sale Order"
+msgstr ""
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Reject"
+msgstr ""
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Request Validation"
+msgstr ""
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Restart Validation"
+msgstr ""
+
+#. module: sale_tier_validation
+#: model:ir.model,name:sale_tier_validation.model_tier_definition
+msgid "Tier Definition"
+msgstr ""
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Validate"
+msgstr ""
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "Validated"
+msgstr ""
+
diff --git a/sale_tier_validation/i18n/zh_CN.po b/sale_tier_validation/i18n/zh_CN.po
new file mode 100644
index 00000000000..15b9db61440
--- /dev/null
+++ b/sale_tier_validation/i18n/zh_CN.po
@@ -0,0 +1,85 @@
+# Translation of Odoo Server.
+# This file contains the translation of the following modules:
+#	* sale_tier_validation
+#
+msgid ""
+msgstr ""
+"Project-Id-Version: Odoo Server 12.0\n"
+"Report-Msgid-Bugs-To: \n"
+"SO-Revision-Date: 2019-09-02 19:23+0000\n"
+"Last-Translator: 黎伟杰 <674416404@qq.com>\n"
+"Language-Team: none\n"
+"Language: zh_CN\n"
+"MIME-Version: 1.0\n"
+"Content-Type: text/plain; charset=UTF-8\n"
+"Content-Transfer-Encoding: \n"
+"Plural-Forms: nplurals=1; plural=0;\n"
+"X-Generator: Weblate 3.8\n"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "<i class=\"fa fa-info-circle\"/>This SO needs to be\n"
+"                        validated."
+msgstr ""
+"<i class=\"fa fa-info-circle\"/>这个采购订单需要\n"
+"                        验证。"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "<i class=\"fa fa-thumbs-down\"/> Operation has been <b>rejected</b>."
+msgstr "<i class=\"fa fa-thumbs-down\"/> 操作已被<b>拒绝</b>."
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "<i class=\"fa fa-thumbs-up\"/> Operation has been <b>validated</b>!"
+msgstr "<i class=\"fa fa-thumbs-up\"/> 操作已被 <b>验证</b>!"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "My Sales to review"
+msgstr "查看我的采购"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "Needs my Review"
+msgstr "需要我审查的"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "SOs validated and ready to be confirmed"
+msgstr "采购订单已验证，待确认"
+
+#. module: sale_tier_validation
+#: model:ir.model,name:sale_tier_validation.model_sale_order
+msgid "Sale Order"
+msgstr "采购订单"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Reject"
+msgstr "拒绝"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Request Validation"
+msgstr "请求验证"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Restart Validation"
+msgstr "重新启动验证"
+
+#. module: sale_tier_validation
+#: model:ir.model,name:sale_tier_validation.model_tier_definition
+msgid "Tier Definition"
+msgstr "层定义"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.sale_order_form
+msgid "Validate"
+msgstr "验证"
+
+#. module: sale_tier_validation
+#: model_terms:ir.ui.view,arch_db:sale_tier_validation.view_sale_order_filter
+msgid "Validated"
+msgstr "已验证"
diff --git a/sale_tier_validation/models/__init__.py b/sale_tier_validation/models/__init__.py
new file mode 100644
index 00000000000..551e600d110
--- /dev/null
+++ b/sale_tier_validation/models/__init__.py
@@ -0,0 +1,5 @@
+# Copyright 2019 Open Source Integrators
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from . import sale_order
+from . import tier_definition
diff --git a/sale_tier_validation/models/sale_order.py b/sale_tier_validation/models/sale_order.py
new file mode 100644
index 00000000000..20e70b9a718
--- /dev/null
+++ b/sale_tier_validation/models/sale_order.py
@@ -0,0 +1,11 @@
+# Copyright 2019 Open Source Integrators
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import models
+
+
+class SaleOrder(models.Model):
+    _name = "sale.order"
+    _inherit = ['sale.order', 'tier.validation']
+    _state_from = ['draft', 'sent', 'to approve']
+    _state_to = ['sale', 'approved']
diff --git a/sale_tier_validation/models/tier_definition.py b/sale_tier_validation/models/tier_definition.py
new file mode 100644
index 00000000000..e289fddc934
--- /dev/null
+++ b/sale_tier_validation/models/tier_definition.py
@@ -0,0 +1,14 @@
+# Copyright 2019 Open Source Integrators
+# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
+
+from odoo import api, models
+
+
+class TierDefinition(models.Model):
+    _inherit = "tier.definition"
+
+    @api.model
+    def _get_tier_validation_model_names(self):
+        res = super(TierDefinition, self)._get_tier_validation_model_names()
+        res.append("sale.order")
+        return res
diff --git a/sale_tier_validation/static/description/icon.png b/sale_tier_validation/static/description/icon.png
new file mode 100644
index 00000000000..3a0328b516c
Binary files /dev/null and b/sale_tier_validation/static/description/icon.png differ
diff --git a/sale_tier_validation/views/sale_order_view.xml b/sale_tier_validation/views/sale_order_view.xml
new file mode 100644
index 00000000000..e742656d700
--- /dev/null
+++ b/sale_tier_validation/views/sale_order_view.xml
@@ -0,0 +1,83 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Copyright 2019 Open Source Integrators
+     License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl). -->
+<odoo>
+
+    <record id="sale_order_form_tier" model="ir.ui.view">
+        <field name="name">sale.order.form - test</field>
+        <field name="model">sale.order</field>
+        <field name="inherit_id" ref="sale.view_order_form"/>
+        <field name="arch" type="xml">
+            <button name="action_confirm" position="before">
+                <button name="request_validation"
+                    string="Request Validation"
+                    attrs="{'invisible': ['|','|',('need_validation', '!=', True),('rejected','=',True),('state','not in',['draft','sent','to approve'])]}"
+                    type="object"/>
+                <button name="restart_validation"
+                    string="Restart Validation"
+                    attrs="{'invisible': ['|',('review_ids', '=', []),('state','not in',['draft','sent','to approve'])]}"
+                    type="object"/>
+            </button>
+            <header position="after">
+                <field name="need_validation" invisible="1"/>
+                <field name="validated" invisible="1"/>
+                <field name="rejected" invisible="1"/>
+                <div class="alert alert-warning"
+                     role="alert"
+                     attrs="{'invisible': ['|', '|', '|',
+                     ('validated', '=', True), ('state', 'not in', ['draft','sent','to approve']),
+                     ('rejected', '=', True), ('review_ids', '=', [])]}"
+                     style="margin-bottom:0px;">
+                    <p><i class="fa fa-info-circle"/>This SO needs to be
+                        validated.
+                        <field name="can_review" invisible="1"/>
+                        <button name="validate_tier"
+                                string="Validate"
+                                attrs="{'invisible': [('can_review', '=', False)]}"
+                                type="object"
+                                class="oe_inline oe_button btn-success"
+                                icon="fa-thumbs-up"/>
+                        <button name="reject_tier"
+                                string="Reject"
+                                attrs="{'invisible': [('can_review', '=', False)]}"
+                                type="object"
+                                class="btn-icon btn-danger"
+                                icon="fa-thumbs-down"/>
+                    </p>
+                </div>
+                <div class="alert alert-success"
+                     role="alert"
+                     attrs="{'invisible': ['|', '|', ('validated', '!=', True), ('state', 'not in', ['draft','sent','to approve']), ('review_ids', '=', [])]}"
+                     style="margin-bottom:0px;">
+                    <p><i class="fa fa-thumbs-up"/> Operation has been <b>validated</b>!</p>
+                </div>
+                <div class="alert alert-danger"
+                     role="alert"
+                     attrs="{'invisible': ['|', '|', ('rejected', '!=', True), ('state', 'not in', ['draft','sent','to approve']), ('review_ids', '=', [])]}"
+                     style="margin-bottom:0px;">
+                    <p><i class="fa fa-thumbs-down"/> Operation has been <b>rejected</b>.</p>
+                </div>
+            </header>
+            <xpath expr="//form/div[hasclass('oe_chatter')]" position="before">
+                <field name="review_ids" widget="tier_validation" attrs="{'invisible':[('review_ids', '=', [])]}"/>
+            </xpath>
+        </field>
+    </record>
+
+    <record id="view_sale_order_filter" model="ir.ui.view">
+        <field name="name">sale.order.select - sale_tier_validation</field>
+        <field name="model">sale.order</field>
+        <field name="inherit_id" ref="sale.view_sales_order_filter"/>
+        <field name="arch" type="xml">
+            <filter name="my_sale_orders_filter" position="after">
+                <filter name="needs_review" string="Needs my Review"
+                        domain="[('reviewer_ids','in',uid), ('state', 'not in', ['done', 'cancel','to approve'])]"
+                        help="My Sales to review"/>
+                <filter name="tier_validated" string="Validated"
+                        domain="[('validated', '=', True)]"
+                        help="SOs validated and ready to be confirmed"/>
+            </filter>
+        </field>
+    </record>
+
+</odoo>