Normalized distribution of the expected S/N Å⁻¹ in the observed [4000−5000] and [7000−8000] Å wavelength ranges (left and right), assuming the stacking of 21 exposures of 20 min each (including overheads) for a total exposure time of 7 h. The estimate was obtained using the results of the latest operation rehearsal performed within the WEAVE project. Median and quartile values are shown by the vertical lines. The inset plots in each panel show the relation between the B_AB/I_AB magnitudes and observed S/N Å⁻¹ in the defined wavelength range. For each observed galaxy, lighter points show total magnitudes and darker points show magnitudes within the fibre, see text for more details. See text for more details.