Abstract: The paper analyzes the disadvantage of present research in optimization of Design Structure Matrix,then brings forward the number design structure matrix based on the coupling intensity.After this,the paper combines the number DSM with the genetic algorithm,sets up the objective function,designs the way of coding,crossover,mutation and introduces the newalgo rithm of optimizing the design structure matrix.In addition,taking the designing process of plane for example,achieving the optimization of design time,cost and pro cess.The paper compares the new optimization with the old method.The result reveals that the new optimization has advantage in objective function,efficiency in finding best result and the best result it self.

Key words: design structure matrix, information feedback, product development, genetic algorithm