Tolerance piling was a huge lesson: each tiny variance compounds across settings up, so shop drawings define voids

https://telegra.ph/Hand-Fabricated-Copper-Cupolas-What-Architects-Know---and-Time-Confirms-07-06

Tolerance stacking was a large lesson: each tiny variance substances across assemblies, so shop illustrations specify voids, shims, and port sizes to make sure an ideal site fit.