What is the most important item to confirm first?
Exact size and shape, ideally via a drawing or template rather than a verbal description, since this is hardest to correct once production starts.
Should finish be confirmed digitally or with a physical sample?
Always with a physical sample, since digital references can be misleading once applied to a full-sized board.
Does mounting need special consideration for custom shapes?
Often yes, particularly for shapes with uneven weight distribution, which may need a different mounting approach than a standard rectangle.
Where should branding be checked against usability?
Against how the board will realistically be used day to day, to avoid branding interfering with the main writing area.
Why confirm sign-off authority before production?
It avoids costly changes once manufacturing has started, since adjustments become harder and more expensive at that stage.