In this photo you can see a squared log with a slab laying next to it after its pass through the band saw. This will continue until the log has been completely cut into dimension lumber. Then the next log drops onto the saw table for its trip through the sawing process. The computer that controls all this can be set to prefer 2x4 lumber with decreasing preference for 2x6 or 4x4 or other dimensions, depending on current market demands. This allows the mill to maximize their profits by producing the product which is bringing the highest price.