I could have benefited from this in the construction of our house. Riddled with inaccuracies, the engineer signed off on the foundations, but we found out when the walls were up that the builders used the internal dimensions as exterior dimensions. So our house is smaller by ~250mm on each side.
We had to make so many compromises and wastages as a result. Bathrooms now smaller if we want to keep other rooms the same, bathtubs couldn't fit, aw man.
Then when the house went up to 2nd and 3rd levels, the staircase was narrow and wasn't connecting between the levels. That alone delayed us by 3 months as we had to get the architect to build a 3D model of the affected area so we could figure it out. We have to hoist furniture up through balconies as it can't fit through the stairs.
I think having some machinery that minimises human error would be very helpful.
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