where 𝑓 + is the area fraction of lamellae, 𝑓 , is the fraction of single layers and 𝑓 -is the fraction of double layers. Shown in Figure is a ML fit to the average number of layers, as a function of SVA conditions, which reveals several important features of the phase formation. As expected, we see that the average number of layers generally increases as the initial thickness and swelling degree increases. However, at swelling degrees less than ~1.8, the average number of layers is essentially insensitive to changes in the swelling degree, which is likely due to the very slow kinetics at these swelling degrees. One of the most useful features of this map is identifying the SVA conditions where the average layer number is close to 1.0 and is insensitive to fluctuations in SVA conditions. Specifically, from a practical device manufacturing perspective, there will always be non-uniformities in film thickness, mass transport, and solvent uptake over the entire substrate. As such, it is important to consider these system sensitivities to inputs when selecting SVA conditions, where regions of a plateau with an average layer number of 1.0 are most desirable.