98 lines
3.2 KiB
ReStructuredText
98 lines
3.2 KiB
ReStructuredText
.. _concept-product:
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Product
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=======
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When the *Stock Module* is activated, products gain some extra properties.
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These include a product's stock and forecast quantities, which show its
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current and predicted future stock situation, and the cost value of its
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stock.
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.. seealso::
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The `Product <product:concept-product>` concept is introduced by the
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:doc:`Product Module <product:index>`.
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.. _concept-product.quantity:
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Product Quantity
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----------------
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The amount, and the value, of a product in a
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`Stock Location <model-stock.location>` is calculated by adding up all the
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`Stock Moves <model-stock.move>` in to that location and subtracting those
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out of the same location.
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Some values from the
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:attr:`Transaction context <trytond:trytond.transaction.Transaction.context>`
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are used to help determine which stock moves get included in this calculation
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and which get left out.
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These values include things like which locations to include in the
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calculation, and what dates should be included.
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Normally, when calculating stock quantities for a date in the past, only moves
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that are done are included in the calculation, and only if their effective
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date is early enough.
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This reflects the real situation based on completed stock moves.
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For dates in the future, draft and `Assigned <concept-stock.move.assign>`
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moves are also included, but only if their planned date is between today's
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date and the future date, inclusive.
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.. note::
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The stock quantity of consumable products is calculated in exactly
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the same way as any other product, even though consumable products
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can always be assigned regardless of how much stock there is.
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Wizards
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-------
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.. _wizard-product.recompute_cost_price:
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Recompute Cost Price
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^^^^^^^^^^^^^^^^^^^^
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The *Recompute Cost Price* wizard updates products' cost prices using their
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cost price method.
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.. _wizard-product.modify_cost_price:
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Modify Cost Price
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^^^^^^^^^^^^^^^^^
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The *Modify Cost Price* wizard is only way in which a product's cost price
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can be changed once it has stock moves.
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The wizard takes a date and a fixed price or formula for the new cost price.
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These changes are stored in the
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`Cost Price Revision <model-product.cost_price.revision>` concept and are
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applied at the beginning of the date that was selected when the cost price
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of the product gets re-calculated.
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.. _model-stock.product_quantities_warehouse:
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Product Quantities by Warehouse
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===============================
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The idea of the *Product Quantities by Warehouse* concept is to provide
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information about how the stock levels of one or more products have varied
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over time in a particular `Warehouse <concept-stock.location.warehouse>`.
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.. _model-stock.product_quantities_warehouse.move:
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Product Quantities by Warehouse Move
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====================================
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The *Product Quantities by Warehouse Move* concept provides information about
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how `Stock Moves <model-stock.move>` have affected the stock levels in a
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`Warehouse <concept-stock.location.warehouse>` over time.
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.. _model-product.cost_price.revision:
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Cost Price Revision
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===================
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The *Cost Price Revision* records changes to a product's cost price.
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These revisions are automatically created when the product's cost price is
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changed using the `Modify Cost Price <wizard-product.modify_cost_price>`
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wizard.
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