as best as I understand it, here is how matchmiker works, as has already been mentioned there are significant diferances from solo to group queue
Solo Queue
the matchmaker tries to put 12 players of the same PSR level on both teams, with the same combined tonage if after x seconds (I think x = 30) it has not found a match it activates a release valve and loosens the requirements, and keeps loosening them every x seconds until 5 minutes, at which time if it has not found you a match tonnage matching is extremely wide and you can be up against players of up-to 3 consecutive tiers, so 1-3, 2-4 or 3-5
now here is where it gets a bit confusing, lets say there are 1,000 t3 players in the queue and they are getting matches in a few seconds, and there is a single t1 player who has been waiting for more t1 or t2 players for 4 minutes and 59 seconds, at the 5 minute mark he is put up against t3 players who may have only been in the queue for 5 seconds.
Group Queue
when you group up for group queue you have a tonnage limit based on the size of the group, a 2 player group can take between 20 and 100 tons per Mech, with the tonnage range narrowing for each additional Mech, I am pretty sure a 4 player group has 37.5 and 85 tons per Mech
(my lance cannot run 4 Lights but can run 2 35 tonners and 2 40 tonners, and has often ran 2 Warhammers, with 2 100 tonners) and a 12 player group has, if I remember correctly
(it has been a while since I was last in a 12 player group), an average of 50 tons per Mech to counter the advantage of better coordination,
so if 6 groups of 2 players come up against a 12 player group the 6x2 team could literally have double the tonnage of the 12, but the 12 will likely be better organised, countering out most of the disadvantage
as for skill based matchmaking the matchmaker averages out the level for each group, and tries to put teams up against teams with a similar average, however this is complicated by the need to find groups of players who can form a 12 player team, tonnage only plays a part if the group sizes are identical on both teams, and even then that would be something which is quickly disregarded after the first matchmaker release valve.
Faction Play
the matchmaker puts together 12 players for invasion or 4 for scouting, that is all the faction play matchmaker does, there is no skill based or tonnage based matchmaking in faction play
Edited by Rogue Jedi, 08 September 2016 - 12:43 PM.