International Journal of Advances in Computing and Information Technology
International Journal of Advances in Computing and Information Technology · 2012
In this paper, second order response surface designs which in parts are useful to estimate responses and slopes with spherical variance functions are obtained. Specifically a model on augmenting second order rotatable designs (SORD) with additional axial and central points to form second order slope rotatable designs, four and six level second order response surface designs using balanced incomplete block designs.