I think by seeing overall chats n scenarios here on this forum, i think there is no specific steps or stages that officer would follow. Every case is different processing wise, some applicants has IP1 for more than over 50 days where as some had update n was straight in to IP2 n it is since 50 or more days. Like
@strikeharsh said he is waiting n has BGC processing since over 50 days whereas some get PPR right after BGC update. N sometime depends on agent, if you are lucky enough to have good one, they will give you most of details. N some agents strictly says that processing is min 6 months so its too early that we are inquiring about. It all depends i guess.