It is important to be able to predict the likely environmental effects of plans, programs, and projects in order to promote environmentally sustainable development (Sheate et al., 2001; Jones et al., 2005). Since it assesses the environmental effects of plans and programs affecting the initial stages of a development project, PERS can act as a means to create sustainable development. However, systematic approaches to environmental assessment for high-level administrative plans could not proceed because the PERS system was conducted on a too restricted set of plans and programs. For example, in the area of urban development, there is a hierarchy of administrative plans; each has a role and scope stipulated in law. Generally the higher level of plan has a wider scope than the lower level of plan.