Okay using chipping optimiser (which I assume is based on master-curve (which I can't find any other appropriate thread to post in)) I took a sample skill volume from 6100 to 6000, which ended up giving me an odd result... So I investigated further
Standard master-curve (or whatever it's referred to nowadays) V(x)
dV/dx
Definable dV/dx regions
Discontinuities
So my questions with relation to dV/dx
1) Are those discontinuities intentional?
2) Are the discontinuities consistent with data gathered
3) Is there any reasoning why the function dV/dx changes at those discontinuities
4) Is attribute volume and dV/dx known to be similarly affected? If not... can we assume the function for attributes can be arrived at by deconvoluting the function from dV/dx and removing the sin component?