A PERS report has to be prepared in the initial stage of formulating the plan (or program) so that the results of the PERS are easily reflected in the plan. Public and the related agencies are given ample opportunities to express their opinions regarding the PERS report since it is prepared at an early stage in the planning process and they can suggest comments within a set period of time. Fig. 1 illustrates a significant change made in the PERS process before and after the amendment of the legal basis on June 2006.