The term (\(V\)) is a function of (\(E\)), (\(S\)) and (\(A\)).
\[
V = f(E, S, A)
\tag{2.1}\]
\[
cell_{S} = \sum_{spp}{p * w}
\tag{2.2}\]
The raster of sensitivity (\(S\)) contains cells representing a sum across species (\(spp\)) of presence (\(p\)) multiplied by the sensitivity weight (\(w\)) (Equation 2.2).