UVM Verification Explained with a Simple Example

The UVM mental model

Think of UVM as a factory of reusable testbench parts. Each part has a single job:

Component	Job
Sequence	Generates stimulus items
Driver	Pushes items onto the DUT pins
Monitor	Snoops the bus and broadcasts
Scoreboard	Compares actual vs expected
Agent	Bundles driver + monitor + sequencer

Why bother

Random + constrained stimulus catches bugs your directed tests will never imagine. A good UVM env hits functional coverage closure 10x faster than directed testing.