Book excerpt: PARVCOST, A FORTRAN program , was designed to develop economic and financial analysis of systems for manufacturing particleboard. In the program, costs and requirements of wood are calculated as are chemicals and energy per unit of finished board products. Estimates are made of sensitivity of the finished product costs to changes in unit costs of energy and raw materials. Wight statistics are computed for the finished product and for the profit contribution ration for clues of given products. An appendix is included with a sample program output, two version of data decks and modifications, notes on use of the two version, and a listing of the program and documentation cards.