How add 2 QC Inspection stages in a Multi Level BOM

We have an Item which has multiple BOMs associated with it.

I have created the set of BOMs and everything is working perfectly.

But after BOM Palette is manufactured we need to have 2 QC Inspections.

One QC Inspection is done my the zone in-charge and another QC Inspection is done by the in-charge of the next zone (Short Blast Zone) before he takes the Palette for short blasting.

How can we force ERPNext to have two inspections between two manufacturing processes?