[IMP] inventory: New V13 doc about min stock rules and mto

[IMP] inventory: New V13 doc about min stock rules and mto
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===========================================================
How to choose between minimum stock rule and make to order?
===========================================================
=================================================
Choose Between Reordering Rules and Make to Order
=================================================
**Minimum Stock rules** and **Make to Order** have similar consequences but
different rules. They should be used depending on your manufacturing and
delivery strategies.
*Reordering rules* and *make to order* do both allow to
automatically replenish products when necessary. The difference between
those tools is how they are triggered.
Terminology
===========
Minimum stock rule
-------------------
**Minimum Stock** rules are used to ensure that you always have the minimum
*Reordering rules* are used to ensure that you always have a minimum
amount of a product in stock in order to manufacture your products
and/or answer to your customer needs. When the stock level of a product
reaches its minimum the system will automatically generate a procurement
with the quantity needed to reach the maximum stock level.
with the needed quantity to reach the maximum stock level.
Make to Order
-------------
The **Make to Order** function will trigger a **Purchase Order** of the amount
of the **Sales Order** related to the product. The system will **not** check
the current stock valuation. This means that a draft purchase order will
be generated regardless of the quantity on hand of the product.
The *Make to Order* route will trigger a procurement (purchase order
or manufacturing order) with the necessary quantity to fulfill a product
request (coming from a sale order or a manufacturing order). The system
will check the quantity on hand for the corresponding product and if the
available quantity is higher or equal to the necessary quantity, Odoo
will use what is in stock to fulfill the request. In case you dont have
enough available stock to fully fulfill the product request, procurement
will be generated for the total quantity requested.
Configuration
=============
Minimum stock rules
-------------------
Reordering Rules
----------------
The Minimum Stock Rules configuration is available through the menu
:menuselection:`Inventory --> Inventory Control --> Reordering Rule`
in the drop down menu. There, click on **Create** to set minimum and
maximum stock values for a given product.
The *Reordering Rules* configuration is available through the menu
*Inventory > Master Data > Reordering Rules*. There, click on
*Create* to set minimum and maximum stock values for a given product.
.. image:: media/min_stock_rule_vs_mto01.png
.. image:: media/min_stock_rule_vs_mto_01.png
:align: center
.. demo:fields:: stock.action_orderpoint_form
When the forecasted stock goes below the *Minimum Quantity* specified
in this field, Odoo generates a procurement to bring the forecasted
quantity to the *Maximum Quantity*. The *Quantity Multiple* is used
to round the procurement quantity up to this multiple. If it is 0, the
exact quantity will be used.
Then, click on your product to access the related product form and, on
the **Inventory submenu**, do not forget to select a supplier.
.. image:: media/min_stock_rule_vs_mto_02.png
:align: center
.. image:: media/min_stock_rule_vs_mto02.png
The *Lead time* is the number of days after the order point is
triggered to receive the products or to order them to the vendor.
In case you work with multi-warehouses and/or multi-locations, you will
be able to specify different reordering rules for the same product in
each location.
.. tip::
For the reordering rules to be triggered, on the corresponding product,
a route should be specified. In case you manufacture your products, make
sure to select the route *Manufacture* and create a *Bill of Material* for the product. In case you purchase your products, make
sure to select the route *Buy* and add a *Vendor Pricelist*.
.. image:: media/min_stock_rule_vs_mto_03.png
:align: center
.. image:: media/min_stock_rule_vs_mto_04.png
:align: center
.. tip::
Don't forget to select the right product type in the product form.
A consumable can not be stocked and will thus not be accounted for in the stock valuation.
Don't forget to select the product type *storable* in the product
form. A consumable can not be stocked and wont trigger reordering
rules.
Make to Order
--------------
Make to Order
-------------
The Make to Order configuration is available on your product form
through your :menuselection:`Inventory module --> Inventory control --> Products`
(or any other module where products are available).
The *Make To Order* configuration is available on your product form
through your *Inventory module > Master Data > Products* (or in any
other module where products are available).
On the product form, under **Inventory**, click on **Make To Order**.
On the product form, in the *Inventory tab*, you can set a route. You
can choose *Make To Order* and another route, either *Buy* or
*Manufacture*.
.. image:: media/min_stock_rule_vs_mto03.png
:align: center
Again, if the *Buy* route is selected, make sure to set a *Vendor
pricelist* in the *Purchase tab*. In case you have set a
*Manufacture* route, male sure you have a *BoM* for this product.
Choice between the two options
------------------------------
The choice between the two options is thus dependent of your inventory
strategy. If you prefer to have a buffer and always have at least a
minimum amount, the minimum stock rule should be used. If you want to
reorder your stocks only if your sale is confirmed it is better to use
the Make to Order.
.. image:: media/min_stock_rule_vs_mto_05.png
:align: center

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========================
Create Storable Products
========================
======================
Set your Initial Stock
======================
The first step to use the inventory application is to create products in
your database via the menu *Master Data > Products*. Click the Create