As design get larger and larger, we found Valor NPI run time begins to be an issue. On some of Allegro databases, it takes 8 hours ~12 hours for fab and assembly checks. Here is a typical break down of total running time for those databases:
Power and Ground Checks taken 60~90% times
Netlist validation taken 10-30% times
other total taken only 10%
I have been morniting Valor NPI process and found it need hours to do following process due to very tiny slivers in database
Power Pads Processing
Enlarging Plane shapes
Generating Shapes Netlist
However, you can't always avoid tiny slivers in your layout. How you can descrease the process time?
Yanfeng