Abstract: Aiming at the limitation in search direction of integer gradient method
and the drawbacks in direction divergence occuring at times in integer treat-
ment, this paper has proposed a discrete method with rather good search direction or DDSM, which takes the advantage of the objective function information at coordinate ad jacent points in discrete design space and through proper stretches, and constructs a rather good discrete search direction, With its help we have successfully solved 14 engineering and mathematical probl-ems. Optimization practice has showed that calculating speed and its reliab-ility are more satisfactory, In particular, the calculating efficiency is re-markably raised as compared with present discrete optimization methods,

Key words: Optimum design Discrete direct search method O