ized to .-resolvability and affine .-resolvability by Shrikhande and Raghavarao (1964).In this paper, a representation of parameters of an affine .-resolvable BIB design is given and necessary conditions for the existence of this design are derived.Some methods of constructing (affine) .-resolvable BIB designs are given and some inequalities for these designs are obtained.Finally, some information on the block structure of .-resolvable BIB designs is provided.