The next step is the construction of the relationshipcdiagram. This represents the activities of the buff diagramcwith the ASME notation, connected with lines. Thecnumber of lines linking two activities derives from theclevel of desired nearness: four lines for the A class ofadjacency, three for the E class, and so on.The relationship diagram, which derives from the relationship chart, allows the consideration of alternative layout configurations. Among them we will find the best solution, chosen considering more than just factors of economy, such as the improvement of material flow and waste reduction, etc.