The decision making trial and evaluation laboratory (DEMATEL) method is used for separating the cause and effect of any problem. The Combined Effect Time Dependent matrix (CETD) is used to determine the maximum age or the peak factor of any problem. Therefore, instead of finding the peak factor of cause-effect group separately using CETD matrix, a new model could be formulated by integrating the salient features of DEMATEL in CETD matrix so that the peak factor of the problem of cause-effect group can be found out simultaneously. The validity of the model is verified by applying in the problem of aggressive behavior and involvement in violence. © International Journal of Pharmacy and Technology. All rights reserved.