The OSB model that forms part of the PANELSIM™ program is an economic model of an OSB mill that takes a similar approach to that used for plywood and LVL mill optimization. The objective is to calculate the combination of raw materials, mill operation and mix of OSB panel sizes, thicknesses and grades that maximize net cash flow for the whole operation. The model uses linear programming to choose the panel recipes from a list that will maximise the return, taking raw material costs, equipment capacities and sales prices and constraints into account.