# Period

In Tryton a stock Period is used to group together the all stock moves that happened up to a specific date and that were also done after the date of any previous stock Period.

This allows the stock levels for the Products <concept-product> in all stock Locations <model-stock.location> to be calculated for the date of the period, and stored in the Stock Period Cache <model-stock.period.cache>.

These cached values can then be used, where applicable, instead of having to recalculate them each time they are needed.

See also

The periods can be viewed and managed from the main menu item:

> Inventory & Stock ‣ Configuration ‣ Periods

# Period Cache

The Period Cache is used to store the quantities of a product in a particular location on the date defined by its Period <model-stock.period>.