[ADD] inventory: What is a removal strategy (FIFO, LIFO, FEFO, Specific Indentification)?

https://docs.google.com/document/d/17wiBQRBM-y7Xvy2MzhE04tBnqnkijhKPkPKTo2V8wjc/edit?usp=sharing

inventory/routes/strategies.rst

@@ -7,5 +7,4 @@ Putaway & Removal Strategies
    :glob:
 
    strategies/putaway
-   strategies/storage
    strategies/removal

inventory/routes/strategies/removal.rst

@@ -1,3 +1,163 @@
 ========================================================================
 What is a removal strategy (FIFO, LIFO, FEFO, Specific Indentification)?
-========================================================================
+========================================================================
+
+Overview
+========
+
+Removal strategies are usually in picking operations to select the best
+products in order to optimize the distance for the worker, for quality
+control purpose or due to reason of product expiration.
+
+When a product movement needs to be done, Odoo will find available
+products that can be assigned to shipping. The way Odoo assign these
+products depend on the **removal strategy** that is defined on the **product
+category** or on the **location**.
+
+Configuration
+=============
+
+In the **Inventory** application, 
+go to ..menuselection:`Configuration --> Settings`:
+
+.. image:: media/removal01.png
+    :align: center
+
+.. image:: media/removal02.png
+    :align: center
+
+Check **Track lots or serial numbers**, **Manage several location per
+warehouse** and **Advanced routing of products using rules**, then click
+on **Apply**.
+
+Then, open :menuselection:`Configuration --> Locations` 
+and open the location on which you want to apply a removal strategy.
+
+.. image:: media/removal03.png
+    :align: center
+
+Types of removal strategy
+=========================
+
+FIFO ( First In First Out )
+---------------------------
+
+A **First In First Out** strategy implies that the products that were
+stocked first will move out first. Companies should use FIFO method if
+they are selling perishable goods. Companies selling products with
+relatively short demand cycles, such as clothes, also may have to pick
+FIFO to ensure they are not stuck with outdated styles in inventory.
+
+Go to :menuselection:`Inventory --> Configuration --> Locations`, 
+open the stock location and set **FIFO** removal strategy.
+
+Let's take one example of FIFO removal strategy.
+
+In your warehouse stock (``WH/Stock``) location, there are ``3`` lots of ``iPod
+32 Gb`` available.
+
+You can find details of available inventory in inventory valuation
+report.
+
+.. image:: media/removal04.png
+    :align: center
+
+Create one sales order ``25`` unit of ``iPod 32 GB`` and confirm it.
+
+You can see in the outgoing shipment product that the ``Ipod 32
+Gb`` are assigned with the **oldest** lots, using the FIFO removal
+strategy.
+
+.. image:: media/removal05.png
+    :align: center
+
+LIFO (Last In First Out)
+------------------------
+
+In this warehouse management, the products which are brought in the
+last, moves out the first. LIFO is used in case of products which do not
+have a shelf life.
+
+Go to :menuselection:`Inventory --> Configuration --> Locations`, 
+open the stock location and set **LIFO** removal strategy.
+
+In our example, let's check the current available stock of ``Ipod 32 Gb``
+on ``WH/Stock`` location.
+
+.. image:: media/removal06.png
+    :align: center
+
+Create a sale order with ``10`` units of ``Ipod 32 Gb``.
+
+You can see in the outgoing shipment product that the ``Ipod 32
+Gb`` are assigned with the **newest** lots, using the LIFO removal
+strategy.
+
+.. image:: media/removal07.png
+    :align: center
+
+FEFO ( First Expiry First Out ) 
+--------------------------------
+
+In FEFO warehouse management, the products are dispatched from the
+warehouse according to their expiration date.
+
+Go to :menuselection:`Inventory --> Configuration --> Setting`. 
+Check the option **Define Expiration date on serial numbers**. 
+Then click on **Apply** to save changes.
+
+.. image:: media/removal08.png
+    :align: center
+
+It will allow you to set **best before date**, **end of life date**, **alert
+date** and **removal date** on the serial number. Go to 
+:menuselection:`Inventory Control --> Serial Numbers/Lots`.
+
+.. image:: media/removal09.png
+    :align: center
+
+-   **Best Before Date**: This is the date on which the goods with this
+    serial number start deteriorating, without being dangerous yet.
+
+-   **End of Life Date:** This is the date on which the goods with this
+    serial number may become dangerous and must not be consumed.
+
+-   **Removal Date:** This is the date on which the goods with this
+    serial Number should be removed from the stock.
+
+-   **Alert Date:** This is the date on which an alert should be notified
+    about the goods with this serial number.
+
+Products will pick first with expiry date (removal date), So you have
+to set removal date on lot/serial numbers.
+
+To set the removal strategy on location, go to 
+:menuselection:`Configuration --> Locations` and choose FEFO.
+
+.. image:: media/removal10.png
+    :align: center
+
+Let's take an example, there are ``3`` lots of ``ice cream`` available in
+``WH/Stock`` location: ``LOT0001``, ``LOT0002``, ``LOT0003`` with 
+different expiration date.
+
++-----------------------+---------------+-----------------------+
+| **Lot / Serial No**   | **Product**   | **Expiration Date**   |
++=======================+===============+=======================+
+| LOT0001               | Ice Cream     | 08/20/2015            |
++-----------------------+---------------+-----------------------+
+| LOT0002               | Ice Cream     | 08/10/2015            |
++-----------------------+---------------+-----------------------+
+| LOT0003               | Ice Cream     | 08/15/2015            |
++-----------------------+---------------+-----------------------+
+
+We will create a sale order with ``15kg`` of ``ice cream`` and confirm it.
+
+The outgoing shipment related to sale order will make the move based on
+removal strategy **FEFO**.
+
+It will take ``10kg`` from ``LOT0002`` and ``5kg`` from ``LOT0003`` based on the
+removal dates.
+
+.. image:: media/removal11.png
+    :align: center

inventory/routes/strategies/storage.rst

@@ -1,3 +0,0 @@
-=====================================================
-How to store specific products to specific locations?
-=====================================================