Two drivetrains, one plant. The combustion unit is machined and bolted, the electric unit is bonded and sealed. Both have tolerances no one can check by eye, and both are closed before anyone gets a second look inside.
In engine and gearbox assembly, vision guides the handling of heavy castings and confirms that every component is in place before the next step covers it. Sealant beads on oil pans, gearbox covers and housing halves are checked while the flange is still open, because a bead defect found after bolting means disassembly.
On the battery side, the demands shift. Thermal interface material between module and cooling plate, modules set into a housing with millimetre clearances, HV connectors that have to be fully locked before the lid goes on. Each of these becomes inaccessible once the next part is placed, which is why the check belongs inside the process and not at the end of it.