Slide 28 of 173
Notes:
This example shows what happens in a typical circuit when an input is changed. Several hazards are visible on the output while the internal circuit nodes settle to their final values. In this example, a delay fault at least as large as the time of measure (12 units) is detectable. It is more difficult to tell how small a delay fault can be before it is detectable because of the hazards.
Figure from [Waicukauski87]
