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Models timing-related defects where a signal eventually reaches its correct state, but does so too slowly, violating the clock period.

Perform full timing analysis on scan paths to eliminate hold-time violations introduced by physical routing constraints across the die. but does so too slowly

solutions are critical for managing the complexity of modern VLSI circuits. DFT integrates specific features into the hardware to maximize controllability (setting nodes to specific logic values) and observability but does so too slowly