  We study the evolution of non-Gaussianity in multiple-field inflationary
models, focusing on three fundamental questions: (a) How is the sign and peak
magnitude of the non-linearity parameter fNL related to generic features in the
inflationary potential? (b) How sensitive is fNL to the process by which an
adiabatic limit is reached, where the curvature perturbation becomes conserved?
(c) For a given model, what is the appropriate tool -- analytic or numerical --
to calculate fNL at the adiabatic limit? We summarise recent results obtained
by the authors and further elucidate them by considering an inflection point
model.
