This option controls the point in time at which the serial number needs to be registered. If the value is set to Picking, ...

This option controls the point in time at which the serial number needs to be registered. If the value is set to Picking, the user will be prompted for the serial number when picking the material in the warehouse. If the value is set to Packing, the user will be prompted for the serial number at the packing station and when they register the consumption of the material in production.