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Design
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The *Purchase Product Quantity Module* extends the following concepts.

.. _model-purchase.product_supplier:

Product Supplier
================

When the *Purchase Product Quantity Module* is activated, product suppliers
gain some extra properties.
These include a minimal and rounding quantity which are enforced on the
`Purchase <purchase:model-purchase.purchase>` lines created from :doc:`Purchase
Request <purchase_request:index>`.

.. seealso::

   The `Product Supplier <purchase:model-purchase.product_supplier>` concept is
   introduced by the :doc:`Purchase Module <purchase:index>`.