using $N=1$ supergravity formalism that the UV preserves one supersymmetry. On top of this, for simplicity’s sake, we assume that the sole source of SUSY breaking is the ISS sector, with the constant $W_0$ setting the scale of $m_{3/2}$, essentially postulating that $W=W_{\mbox{ISS}}+W_{\mbox{UV}}$, $\<W_{\mbox{UV}}\>=W_0\neq 0$, that $F_{\mbox{UV}}\ll F_{\Phi}$ and that the UV has been decoupled. While the constant can be dynamically generated in a explicit model we do not attempt to do so here (for an example where a KKLT model [@Kachru:2003aw] is used in the UV see [@Abe:2006xp]). Finally we note that the UV’s contributions to the Kähler geometry, and hence $V_{\mbox{quad.}}$, are uncalculable, but should be small on dimensional grounds.

Global ISS review
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ISS showed that meta-stable SUSY breaking is possible in a wide class of remarkably simple models. One of their main examples is supersymmetric QCD with $N_f$ flavours and $N_c$ colours. If one lies in the free magnetic range, $N_c<N_f<\frac32 N_c$, then the low energy theory is strongly coupled, but admits a dual interpretation in terms of IR-free, magnetic variables.

The tree-level potential in the magnetic theory is given by an R-symmetry preserving O’Raifeartaigh model [@O'Raifeartaigh:1975pr] and so SUSY has to be spontaneously broken: $F_i=0$ 