Map of conditions for triggering planetesimal formation by the streaming instability as well as the outcome of planet formation simulations, both as a function of Stokes number St and turbulent diffusion coefficient δ. We use here a viscosity parameter for angular momentum transport of α = 10⁻² and an initial disc of either 112 AU (top) or 55 AU (bottom). We refer to the main text for a full discussion of these two plots.