Each page covers the practical side of optimizing that material: the stock you are likely to hold, how the saw settings behave, and what to watch for in a cutting list.
Window, door and curtain-wall profile systems, box section, and other aluminium extrusion.
Structural bar, tube, angle and box section for fabrication and metalwork.
Round and square pipe or tube cut to length from fixed stock lengths.
Dimensional lumber, studs, decking and moulding cut by length.
Straight-length reinforcement bar cutting ahead of bending and placement.
The optimizer works on lengths and quantities, not on material types — PVC, composite or anything else sold by length optimizes the same way.
The solver only ever sees lengths, quantities and saw settings — which is why it works on any linear stock, and why the three things below are worth getting right per shop.
What the supplier actually delivers differs by material and by trade — and the optimizer only mixes lengths it has been told about.
Blade width is a property of your saw, not of the material. Measure your own rather than carrying a default from one shop to the next.
The length below which an offcut stops being worth racking depends on the parts you routinely cut. It is a shop setting, not a constant.