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Numerical optimization is a new, powerful, flexible tool which can aid engineers in the design process. This paper presents guidelines for the selection and formulation of optimization problems. It also provides insight into how to choose and program an optimization algorithm for the computer. Two example problems are solved to illustrate the use of optimization in earthmoving equipment design.

New 75 and 90 kilowatt rubber tired log skidders have been recently introduced by John Deere. These machines have increased power and durability over the previous models to meet the increasing demands of the logging industry. This paper presents the major design features and components of these machines.