Table 1: Errors of reduced models produced by four different methods.

Model 𝑛 𝑟 𝑚 𝑝 2 𝜀 S V D 1 2 / 2 𝜀 S V D 1 2 2 / 2 𝜀 B T 1 2 / 2 𝜀 B T 1 2 2 / 2

Building model 24 4 1 1 4.5e−03 4.1e−01 5.1e−01 3.2e−01 3.2e−01
Clamped beam 174 29 1 1 3.3e+02 3.3e−02 1.3e−01 1.3e−03 5.7e−04
International state space 135 27 3 3 1.0e−04 6.7e−04 1.0e−04 3.2e−06 3.2e−06