This research mean to find the links between rusunami function and building module coordination with the building skin material selection with analyzing impact on purpose the determination of function module coordination Rusunami GAA and analyze impact of election concrete precast panel on Rusunami GAA building skins. Research approach did qualitatively with study case with test connection problem formulation fomrs (associative) method. The scope of the research is the function restricted to the unit rusunami residential and a parking area. For the coordination aspect to consider module -forming elements. While considering the criteria of the material aspects building to rusunami to see these criteria in material precast concrete panels. Results of the analysis concluded the use of coordination considering rusunami units and parking functions .. From the aspect of the impact on the function of the building material selection concrete panels ( precast ) that planners have considered material in accordance with the criteria rusunami function as a function of occupancy.