Substantial amounts of various environmental resources, including energy, freshwater, liquid coolant, hydrogen, and raw materials, are needed by the process industry. The process industries have become very concerned with optimized resource consumption and reducing waste due to the limited availability of these environmental assets and growing sustainable development awareness. Additionally, strict environmental regulations and significant increases in the cost of environmental assets have compelled process designers to optimize resource allocation networks (RANs). Process Integration (PI) is an influential method for planning and optimizing in terms of energy, water, and other resource efficiency, as well as environmental stewardship. The three main concepts that elaborate PI methods in theory are heuristics or engineering experience, physical insights such as pinch analysis, and linear optimization. The RAN might benefit from simplification for better implementation, flexibility, functionality and versatility. Reduce the number of interconnections to evolve a RAN. The objective of this chapter is to suggest a uniform and detailed methodology that can gradually improve the preliminary RANs.