| asym1 | This generates a class of asymmetric rotatable response surface designs with neighbour effects under a second order model |
| asym2 | This generates a class of asymmetric rotatable response surface designs with neighbour effects under a polynomial model of order max(s1,s2)-1 |
| sym | This generates a class of symmetric rotatable response surface designs with neighbour effects under a polynomial model of order (s1-1) |