Originally Posted by
WineCountryUA
PN is always released first and PN>PZ.
As for the quantity of PZ, UA will release as little as they think is necessarily based on their projections of unsold space. I have seen everything from PZ0 to PZ9.
PZ0 is most common, PZ1 the next, and the other less frequently.
As for splitting, that can help but you risks only one getting upgrade. If you can live with that, it is a reasonable thing to do,
This topic has been debated endlessly, such as
To split or not to split PNR
Unrelated to OP - can you possibly comment why as a GS I get cleared into PZ for upgrades cleared at the gate? Is it just the gate agent clearing the list manually and picking PZ?