[ADD] inventory: fefo removal

closes odoo/documentation#7294

Signed-off-by: Felicia Kuan (feku) <feku@odoo.com>
Co-authored-by: hojo-odoo <123424465+hojo-odoo@users.noreply.github.com>
Co-authored-by: ksc-odoo <73958186+ksc-odoo@users.noreply.github.com>
Co-authored-by: Zachary Straub <zst@odoo.com>

content/applications/inventory_and_mrp/inventory/warehouses_storage/advanced_operations_warehouse.rst

@@ -18,3 +18,4 @@ Advanced operations
    advanced_operations_warehouse/cluster_picking
    advanced_operations_warehouse/removal
    advanced_operations_warehouse/fifo
+   advanced_operations_warehouse/fefo

content/applications/inventory_and_mrp/inventory/warehouses_storage/advanced_operations_warehouse/fefo.rst

@@ -0,0 +1,126 @@
+============
+FEFO removal
+============
+
+The *First Expired, First Out* (FEFO) removal strategy targets products for removal based on their
+assigned removal dates.
+
+.. seealso::
+   :doc:`Other removal strategies <removal>`
+
+.. _inventory/warehouses_storage/removal-date:
+
+Removal date
+============
+
+Products **must** be removed from inventory before their *removal date*, which is set as a certain
+number of days before the product's *expiration date*.
+
+The user sets this number of days by navigating to the product form's :guilabel:`Inventory` tab.
+Under the :guilabel:`Traceability` section, ensure the :guilabel:`Tracking` field is set to either
+:guilabel:`By Lots` or :guilabel:`By Unique Serial Number`.
+
+Next, select the :guilabel:`Expiration Date` option, which makes the :guilabel:`Removal Date` field
+(and other date fields) appear.
+
+.. important::
+   The :guilabel:`Lots and Serial Numbers` and :guilabel:`Expiration Dates` features **must** be
+   enabled in :menuselection:`Inventory app --> Configuration --> Settings` to track expiration
+   dates.
+
+The expiration date of a product is determined by adding the date the product was received to the
+number of days specified in the :guilabel:`Expiration Date` field of the product form.
+
+The removal date takes this expiration date, and subtracts the number of days specified in the
+:guilabel:`Removal Date` field of the product form.
+
+.. seealso::
+   :doc:`Expiration dates <../../product_management/product_tracking/expiration_dates>`
+
+.. example::
+   In the :guilabel:`Inventory` tab of the product, `Egg`, the following :guilabel:`Dates` are set
+   by the user:
+
+   - :guilabel:`Expiration Date`: `30` days after receipt
+   - :guilabel:`Removal Date`: `15` days before expiration date
+
+   .. image:: fefo/user-set-date.png
+      :align: center
+      :alt: Display expiration and removal dates set on the product form.
+
+   A shipment of Eggs arrive at the warehouse on January 1st. So, the expiration date of the Eggs is
+   **January 31st** (Jan 1st + 30). By extension, the removal date is **January 16th** (Jan 31 -
+   15).
+
+.. _inventory/warehouses_storage/exp-date:
+
+To view the expiration dates of items in stock, navigate to the product form, and click the
+:guilabel:`On Hand` smart button.
+
+Next, click the additional options icon, located on the far-right, and select the columns:
+:guilabel:`Expiration Date` and :guilabel:`Removal Date`.
+
+.. image:: fefo/removal-date.png
+   :align: center
+   :alt: Show expiration dates from the inventory adjustments model accessed from the *On Hand*
+         smart button from the product form.
+
+Workflow
+========
+
+Using the :abbr:`FEFO (First Expired, First Out)` removal strategy ensures that products with the
+nearest removal date are picked first.
+
+To understand how this removal strategy works, consider the following example below about the
+product, `Carton of eggs`, which is a box containing twelve eggs.
+
+The product is tracked :guilabel:`By Lots`, and the product category's :guilabel:`Force Removal
+Strategy` is set to :guilabel:`First Expired, First Out (FEFO)`.
+
+.. seealso::
+   - :ref:`Set up force removal strategy <inventory/warehouses_storage/removal-config>`
+   - :ref:`Enable lots tracking <inventory/warehouses_storage/lots-setup>`
+   - `Odoo Tutorials: Perishable Products <https://www.odoo.com/slides/slide/5324/share>`_
+
+.. list-table::
+   :header-rows: 1
+   :stub-columns: 1
+
+   * -
+     - LOT1
+     - LOT2
+     - LOT3
+   * - On-hand stock
+     - 5
+     - 2
+     - 1
+   * - Expiration date
+     - April 4
+     - April 10
+     - April 15
+   * - :ref:`Removal date <inventory/warehouses_storage/exp-date>`
+     - February 26
+     - March 4
+     - March 9
+
+To see the removal strategy in action, go to the :menuselection:`Sales app` and create a new
+quotation.
+
+Clicking :guilabel:`Confirm` creates a delivery order for today, December 29th, and the lot numbers
+with the soonest expiration dates are reserved, using the :abbr:`FEFO (First Expired, First Out)`
+removal strategy.
+
+To view the detailed pickings, click the :guilabel:`⦙≣ (bulleted list)` icon, located on the
+far-right of the Carton of egg's product line, in the :guilabel:`Operations` tab of the delivery
+order. Doing so opens the :guilabel:`Open: Stock move` pop-up window.
+
+In the :guilabel:`Open: Stock move` pop-up window, the :guilabel:`Pick from` field displays where
+the quantities to fulfill the :guilabel:`Demand` are picked from.
+
+Since the order demanded six Cartons of eggs, using the :abbr:`FEFO (First Expired, First Out)`
+removal strategy, all five Cartons from `LOT1`, with the removal date of February 26th, are picked.
+The remaining Carton is selected from `LOT2`, which has a removal date of March 4th.
+
+.. image:: fefo/eggs-picking.png
+   :align: center
+   :alt: The stock moves window that shows the lots to be removed using FEFO.

content/applications/inventory_and_mrp/inventory/warehouses_storage/advanced_operations_warehouse/removal.rst

@@ -17,19 +17,19 @@ Odoo automatically select how products are selected for orders:
    * -
      - :doc:`FIFO <fifo>`
      - LIFO
-     - FEFO
+     - :doc:`FEFO <fefo>`
      - Closest Location
      - Least Packages
    * - Based on
      - :ref:`Incoming date <inventory/warehouses_storage/arrival_date>`
      - :ref:`Incoming date <inventory/warehouses_storage/arrival_date>`
-     - Removal date
+     - :ref:`Removal date <inventory/warehouses_storage/removal-date>`
      - Location sequence
      - Package quantity
    * - Selection order
      - First in
      - Last in
-     - First to expire
+     - :ref:`First to expire <inventory/warehouses_storage/exp-date>`
      - Alphanumeric name of location
      - Quantity closest to fulfilling demand