Replenishment is either a manual or automatic process.

A manual replenishment request is activated using Replenishment Request.

Automatic Replenishment occurs as soon as the system issues inventory and stock drops below the minimum level. When this happens, a replenishment task is created.

Auto replenishment is set in two places: Warehouse Maintenance and Item-Warehouse Maintenance. You need to set it in both places. If you only set it in one of the two places, replenishment does not work.