conjunction with the optimizer software determines what stock boards to cut and what lengths result by analyzing the different lengths needed to build various trusses the wood can be cut in exactly the lengths needed and done in the most optimal fashion thus reducing the drop advancer 14 is marked in one foot increments 16 to help the operator to verify the proper length of lumber as directed by the computer as described by having easy to see increments the operator readily knows the proper length of board as directed to place on the advancer and knows where the pusher is positioned relative to the length of board to be cut as more fully shown in fig7 and 8 the operator is presented with real time information about the stock pieces to choose for a particular member or members that are being cut and the location of pusher 18 as it advances the wood to saw 22 fig2 shows operator 24 using computer 26 to determine what lengths of stock wood to place on the pre cutter and then when to operate the pusher to move the board into position to be cut with saw 22 the software control that governs pusher 18 printing and pre cutting is described more fully below once the stock is loaded and the operator indicates to the computer that all is ready the pusher moves the board.