[IMP] MRP: updated Variants BOM Management rst content

closes odoo/documentation#2648

Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>

content/applications/inventory_and_mrp/manufacturing/management/product_variants.rst

@@ -1,35 +1,45 @@
-=======================
-Variants BOM Management
-=======================
+==================================
+Managing BoMs for product variants
+==================================
 
-Odoo allows you to use one bill of materials for multiple variants of
-the same product. To activate variants, simply go to :menuselection:`Configuration --> Settings
---> Variants`.
+Odoo allows one bill of materials (BoM) to be used for multiple variants of the same product.
+Having a consolidated BoM for a product with variants saves time by preventing the need to manage
+multiple BoMs.
 
-.. image:: product_variants/bom-variants1.png
-    :align: center
+Activate product variants
+=========================
 
-You will then be able to specify which BOM component lines are to be used in
-the manufacture of each product variant. You may specify multiple
-variants for each line. If no variant is specified on a component line,
-then this component will be used in the BOM of all variants. 
+To activate variants, simply navigate to :menuselection:`Inventory --> Configuration --> Settings
+--> Products`, and then enable the :guilabel:`Variants` option. After that, click :guilabel:`Save`
+to apply the setting. For more information on configuring product variants, refer to :doc:`this
+page <../../../sales/sales/products_prices/products/variants>`.
 
-When defining variant BoMs on a line-item-basis, the **Product
-Variant** field in the main section of the BoM should be left blank as shown 
-below. This field is used when creating a BoM for one specific variant
-of a product only.
+.. image:: product_variants/inventory-variants-settings.png
+   :align: center
+   :alt: Selecting "Variants" from Inventory app settings.
 
+Apply BoM components to product variants
+========================================
 
-.. image:: product_variants/kit-bom1.png
-    :align: center
+Next, create a new BoM or edit an existing one by going to :menuselection:`Manufacturing -->
+Products --> Bills of Materials`. Then, click :guilabel:`Edit`. The :guilabel:`Apply on Variants`
+option to assign components to specific product variants on the BoM is available once the
+:guilabel:`Variants` setting is activated from the :guilabel:`Inventory` application. If the
+:guilabel:`Apply on Variants` field is not immediately visible, activate it from the additional
+options menu.
 
-Note that the same principle applies for the configuration 
-of operations.
+.. image:: product_variants/variants-kebab-menu.png
+   :align: center
+   :alt: "Apply on Variants" option on the additional options menu.
 
-.. image:: product_variants/kit-bom2.png
-    :align: center
+Each component can be assigned to multiple variants. Components with no variants specified are used
+in every variant of the product. The same principle applies when configuring operations and
+by-products.
 
-And for the production of by-products. 
+When defining variant BoMs by component assignment, the :guilabel:`Product Variant` field in the
+main section of the BoM should be left blank, as shown below. This field is used only when creating
+a BoM specifically for one product variant.
 
-.. image:: product_variants/kit-bom3.png
-    :align: center
+.. image:: product_variants/apply-on-variants-bom.png
+   :align: center
+   :alt: Applying components to multiple variants.