CLOUD-3051: Add Flexibility updates (#1771)

cloud_edition/flexibility_mode/docs/system_administration.rst

@@ -65,7 +65,6 @@ Alias                        Argument                                     Action
 ``partners_systemctl <job>`` ``status|start|stop|restart|enable|disable`` Show status, start/stop/restart or enable/disable job consumers. Refer to `this page <job_consumers_and_workers.rst>`_ for more details
 ============================ ============================================ ======
 
-
 Third-party Software Installation
 ---------------------------------
 

cloud_edition/flexibility_mode/index.rst

@@ -24,24 +24,38 @@ Types of environments
 
     The system components are based on :doc:`../../../install_pim/manual/system_requirements/system_requirements`.
 
-Updates and migrations
-----------------------
-
-Updates can include **patches** and **new features**. Integrators are accountables for applying new patches and performing migrations on the PIM.
+PIM updates and migrations
+--------------------------
+
+Following the `Semantic Version <https://semver.org>`_, PIM has 2 main updates:
+
+- patches or minors versions:
+    Can include **bug fixes** and **new features**.
+    Integrators are accountable for applying new patches and performing migrations on the PIM.
+    You can refer to :doc:`../../../migrate_pim/upgrade_minor_version` for more details about the procedure.
+- majors versions:
+    Requires **new versions** of software and various components.
+    Please contact us through the `Helpdesk > Cloud Flexibility and Serenity <https://akeneo.atlassian.net/servicedesk/customer/portal/8/group/23/create/93?summary=Technological%20stack%20upgrade%20for%20PIM&customfield_13302=12701&customfield_13395=13010&customfield_13395%3A1=13016&description=--%21--%20%20Operation%20scheduling%3A%0A--%21--%20%20%20%20-%202h%20downtime%20expected%0A--%21--%20%20%20%20-%20French%20Office%20Hours%0A--%21--%20%20%20%20-%20Should%20be%20scheduled%2048h%20in%20advance%0A--%21--%20%20Please%20offer%20us%20several%20dates%20and%20we%20will%20confirm%20the%20one%20that%20also%20corresponds%20to%20our%20availability>`_  to schedule the upgrade of the technological stack.
+    Then integrators are accountable for performing the PIM migration.
+    You can refer to :doc:`../../../migrate_pim/upgrade_major_version` for more details about the procedure.
+
+Quarterly System updates
+------------------------
 
-You can refer to :doc:`../../../migrate_pim/index` for more details about the procedure.
+In order for you to benefit the best of Flexibility experience, Akeneo schedules system updates on a quarterly basis.
+These updates include **security patches** and **system improvements**.
 
-.. note::
+They will be scheduled every last Wednesday/Thursday of the quarter following these time slots:
 
-    Major upgrades can require **new versions** of software and various components.
-    Please contact us through the `Helpdesk > Cloud Flexibility and Serenity <https://akeneo.atlassian.net/servicedesk/customer/portal/8/group/23/create/93?summary=Technological%20stack%20upgrade%20for%20PIM&customfield_13302=12701&customfield_13395=13010&customfield_13395%3A1=13016&description=--%21--%20%20Operation%20scheduling%3A%0A--%21--%20%20%20%20-%202h%20downtime%20expected%0A--%21--%20%20%20%20-%20French%20Office%20Hours%0A--%21--%20%20%20%20-%20Should%20be%20scheduled%2048h%20in%20advance%0A--%21--%20%20Please%20offer%20us%20several%20dates%20and%20we%20will%20confirm%20the%20one%20that%20also%20corresponds%20to%20our%20availability>`_  to schedule the upgrade of the tech stack.
+- Asia/Australia: Starting **Wednesday at 3pm CET/CEST**
+- Europe: Starting **Wednesday at 6pm CET/CEST**
+- US: Starting **Thursday at 9am CET/CEST**
 
 Backups management
 ------------------
 
 A snapshot of your production instance is made regularly and can be restored upon request.
 
-
 Manage your environments
 ------------------------
 .. toctree::