Zero-crossing

Zero crossing occurs when the stock quantity of an article at a staging location is less than or equal to the upcoming withdrawal requirement. A distinction must be made between intentional and unintentional Zero-crossing. In the case of intentional Zero-crossing, booked inventory and physical inventory are congruent, whereas in the case of unintentional Zero-crossing, they are not.
With the continuous inventory the “event” Zero-crossing is often taken as an impulse to perform an inventory for this storage location or article, in order to reduce the counting or recording effort to a minimum.

Source: logipedia / Fraunhofer IML