imho, this only becomes really interesting when the stock of boards you have to fill an order with contains boards of varying lengths. If your stock is always only
12-meter boards, it is a much simpler optimization.
Have you started trying to design classes/data-structures for this, or started to work on the algorithm, or found an algorithm somewhere you think you can adapt ?
Please show your code.
This CodeProject article contains, I believe, a C# example you can adapt for your project:
C# Bin Packing - Cutting Stock Solver
This CodeProject article might interest you as well:
Rectangle Tiling Algorithm
There's an open-source C# cutting optimizer, Cut Micro, here: [^