Doing manual PI optimization

If the PI advisor fails, what other tools can help the user to optimize the PI.

The use can use the icon under Tools -> Capacito/Inductor library browser. The plot is the impedance seen by the load (Chip/die) without any capacitors. Add the VRM, add the spec, then start adding capacitors (type and number). As you add more capacitor, you will notice change in the curve.