Issue link: https://resources.pcb.cadence.com/i/1541046
9. Prioritizing Placement of Fixed and Critical Components Component placement is the foundation for all routing, signal integrity, power integrity, and assembly success. Certain components (such as connectors, user interfaces, power inlets, antennas, and high-speed ICs) have strict placement requirements dictated by mechanical, electrical, or functional needs. Placing these critical parts first ensures that signal paths are short, routing is feasible, and your board can be assembled, tested, and maintained. If you delay or "fit in" critical items after generic parts, you may create routing blockages, violate design rules, or face insurmountable EMI, SI, or assembly issues later. When And Where To Apply Perform critical and fixed component placement immediately after importing your mechanical outline and constraints (see Tip 5), and before placing passive/support parts or attempting any routing. Apply this for every board, but it's especially vital for dense, high-speed, multi-board, or mechanically constrained assemblies. OrCAD X PCB Layout component placement