Abstract: The concept of processing unit is introduced in this paper to specify the resources in machining systems and then a model of job shop scheduling is developed in the environment of multi functional machine tools.Genetic algorithm is employed in the optimization of the scheduling model.After the optimization procedure by genetic algorithm,a dynamic dispatching process is followed among components,processing units and real machine tools to re optimize the results.At last,numerical experiments are conducted to show the effectiveness and efficiency of the proposed method.

Key words: multi functional machine tool, job shop, genetic algorithm, scheduling