Quantum-Dot Cellular Automata (QCA) is now currently under exploration for the potential replacement for (CMOS VLSI), representing an emerging technological advancement. The visual appeal is derived from the inherent advantages of enhanced speed, diminished size, and decreased energy consumption. In contrast to traditional digital circuits that rely on the transmission of electrical current for information transfer, QCA (Quantum-Dot Cellular Automata) operates by propagating a polarization state to convey information. The ongoing investigation provides a thorough analysis of the design features inherent in combinational logic circuits employed in quantum-dot cellular automata. The designs undergo simulation and testing using the QCAD designer software. The determination of cell count and simulation time for planned circuits is undertaken. The findings are juxtaposed with the current methodologies. The proposed scheme demonstrates better results in terms of reduced simulation time and area when compared to other existing methodologies. The objective is to optimize the circuit density and prioritize a configuration that minimizes the utilization of cells. This technique allows for a comprehensive assessment of cell defects, ensuring a fault scope of 100% for the detection of a singular missing or additional cell.