Time-average ϵ_ff measured in 1.5-kpc-wide hexagonal apertures sampling throughout 67 nearby galaxies targeted by PHANGS, as measured by Leroy et al. (2025). Measurements are plotted against the average cloud-scale velocity dispersion $⟨{\sigma }_{\mathrm{mol}}^{\mathrm{cloud}}⟩$ in each aperture (Leroy et al. 2025; see Sun et al. 2022, 2023 for details). Representative values for the z ∼ 1 clumps examined by Dessauges-Zavadsky et al. (2023) are indicated by the thick gray point and bar, which depict the mean and rms of clumps velocity dispersions, respectively, at the 11% efficiency estimated for these clumps (Dessauges-Zavadsky et al. 2023). Colored lines illustrate the following basic predictions from turbulence-regulated SF models in SFF and MFF scenarios: Krumholz & McKee (2005) (KM05, SFF; blue), Padoan & Nordlund (2011) (PN11, SFF; purple, scaled down by a factor of 10) and Federrath & Klessen (2012) (FK12, MFF; red, scaled down by a factor of 100). Each model is shown at three values of the virial parameter α_vir = 2.9, α_vir = 5.3, and α_vir = 9.7, the 16th, 50th, and 84th percentiles of the plotted regions, respectively. The linewidth of the trends increases with increasing virial parameter. All models adopt ϵ_core = 0.5, b = 0.87, and ϕ_t = 1.9; sound speed c_s = 0.3 km s⁻¹ (see the main text for definitions of these quantities); and, for comparison, the same definition for the critical density, given by Eq. (4), estimated using the appropriate virial parameter for each line.