Method of Exhaustion to Search Orthogonal Balanced Block Designs

When the run size of experiment is relative small, it is possible to use the method of exhaustion to select its possible existing orthogonal balanced block designs. In this way, we can find out both orthogonal balanced block designs as more as possible and some information on how to construct orthogonal balanced block designs for some experiment of big run size. Some result of experiment run size of no more than 9 is given out.