A note on the construction of near-orthogonal arrays with mixed levels and economic run size

Due to run-size constraints, some experimental situations cannot be approached using orthogonal-array design. Near-orthogonal arrays can, however, often be used. This article describes a quick and simple method of constructing this type of array. The arrays constructed here are typically better than those of Wang and Wu with respect to D efficiency as well as other design-goodness criteria.