An image on another forum prompted this question in my mind again, enough to actually post about it. Does anyone know what sort of process British tank factories used? Take this image for instance: Looking at the leftmost line (from our POV) one tank has a turret and the rear sloping louvres mounted (I think) (but raised up vertically). I am unclear whether the tank in front or behind have those louvres attached. None of them seem to have the louvres that cover the flat part of the hull behind the turret. If this was an assembly line I would have thought to expect tanks reaching a more complete status as they progress, so the first tank in this line should be in a more advanced stage than the one behind it. On the other hand, on the rightmost line, 2nd tank up, a tank DOES have covering on the flat part of the hull behind the turret. And the tank closer to us does not. The middle section looks like a specialty area for mounting tracks, so that's somewhat by-the-by, but it's unclear to me that the tanks are progressing in a linear less-to-more completed state in that picture.