In the conceptual design processes of aircraft, the arrangement of equipment presents significant challenges for designers, as it requires optimization and the simultaneous fulfillment of numerous requirements. There is a need for a methodology that can effectively integrate with systems engineering, particularly concerning the placement of various types of equipment in avionics rooms. The Layout Design Modeling (LDM) methodology enables designers to create layout designs based on specific requirements and constraints. During product development processes, this approach allows all designers to collaborate in meeting comprehensive product requirements and to optimize the placement of their equipment in accordance with analytical guidelines using the LDM methodology. In the arrangement of equipment with varying levels of maturity, a holistic approach ensures that the layout is managed and organized effectively, while validation and verification activities form the foundation of the design. Consequently, an effective and efficient layout design study was developed with LDM methodology.