Static Timing Analysis (STA) plays a central role in digital design validation by evaluating the timing integrity of signal transitions without relying on input vectors or functional simulation. It operates purely on the structural and timing models of the circuit, offering a fast and exhaustive alternative to simulation-based verification. By analyzing all logical paths between data launch and capture points, STA determines whether each transition satisfies the design’s timing constraints. This includes both setup and hold checks, across all relevant clocking conditions and process-voltage-temperature corners. Timing paths are the fundamental building blocks of STA. Each path consists of a series of timing arcs, which model the propagation of signals between the pins of logic cells and through the interconnect network. Timing arcs characterize the delay and transition behavior between input and output pins, incorporating properties such as directionality, unateness, and dependency on slew and load. These properties determine how delays vary with input transitions and output capacitance, allowing for precise timing estimation. For instance, unateness describes whether the output t...