What gets asked for here
The return piece is the awkward one on a slab: short, full depth, and rarely nesting neatly against the long lengths, so yield rather than area is what moves the material figure. A join that lands in the wrong place cannot be moved once the cut-outs are machined, so it is settled on the drawing. Edge work on a return matches edge work on a length.
Managed stock usually comes with its own rules about working hours, waste, and who is allowed on site. If the carcasses are tired the honest answer is that stone will find that out, and it is better said before than after. A tired carcass is said before, not discovered after.
