Intelligent stock is what the stock volumes should be based on the stock usage for a given period.
This article will teach you...
How to meet the Pre-Requisites of using Intelligent Stock Control.
Navigate to Menus > Recipies.
How are Intelligent Stock Volumes calculated?
Intelligent Stock volumes are calculated based on meal consumption records.
Select a Stock Item  from the navigation tree.
For the calculation to work, the Recipes feature must be enabled and the recipes need to be set up accurately so that each menu item includes the Quantity  and Unit Of Measure (UOM)  of stock ingredients that are used in its preparation.
For more Recipe details refer to Recipies.