****** Design ****** 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>`.