Abundance variations of CH₃OH and CH₃CCH from chemical models (lines) and the explored parameter space (filled) for the LIME models based on ρ_bulk density model (column A of Table 7). The results from the chemical models are shown as lines (solid, dashed, and dotted): for CH₃OH the abundance profiles for different warm-up timescales are shown (Garrod et al. 2017); for CH₃CCH, abundance profiles of different final collapse densities are shown (Calcutt et al. 2019). The dark green filled region indicates the lower abundance range explored for X_out by the LIME models, and the light green filled region the upper range explored for X_in. The verticalgray lines indicate the jump in temperature of 30 and 80 K.