When a stone is identified as a borderline case between two grades, the system uses an optimisation technique, called a genetic algorithm, to explore the different ways in which the stone could be cut to maximise its value.
She would divide her paintings into squares, halving and quartering, before working and she used a similar technique with her sculptures which she made out of stone, plastic and fiber glass and on which she concentrated from the 1960s.
And even though it's been a very long time since the first knives were crafted out of stone, we haven't given up on that ancient manufacturing technique.