The field of VLSI revolves around the design and implementation of integrated circuits (ICs) that contain thousands, or even millions, of transistors on a single chip. As the complexity of these chips increases, so does the need for thorough testing to ensure their reliability and functionality. VLSI testing involves verifying the correctness of the design and detecting any manufacturing defects that may have occurred during the fabrication process. It is an essential step in the overall VLSI design flow, as it ensures that the final product meets the required specifications. Without adequate testing, the reliability and performance of VLSI chips can be compromised, leading to costly failures in various electronic systems.