They use factors like dominance of NCAA run, difficulty of NCAA Tournament path, overall win percentage, talent, etc.
It's a nice, long, enjoyable read for UConn fans
Here are UConn championship ranks according to them: 2024 (1st rank), 1999 (13), 2004 (25), 2023 (32), 2011 (35), 2014 (38).
Here's the link to the article (may need subscription):
The best of the best separated themselves with their season-long dominance and emphatic victories in their six-game NCAA Tournament journey.
www.nytimes.com
Here's an excerpt:
The Huskies check every box you could ask for in a dominant team. They won the Big East regular season title by four games in a conference that featured a No. 2 seed (Marquette) and a No. 3 seed (Creighton). They also won the conference tournament at Madison Square Garden. They went 37-3 overall, and against a respectable run of opponents in the Big Dance (i.e., no upstart Cinderellas), they won every game by 14 or more points. The Huskies accumulated the largest total margin of victory (plus-140 points in six NCAA Tournament games) for any of the 39 champions ranked in this exercise. In UConn’s final 13 games, only two opponents even came within single digits. That is dominance on full display.
UConn lost only once all season at full strength. One NBA lottery pick, Stephon Castle, missed the Huskies’ loss at Kansas, and fellow top-10 selection Donovan Clingan managed just 14 minutes before sitting out the remainder of a loss at Seton Hall.
From a talent perspective, UConn is right up there with any champion. Clingan, aka “Kling Cong,” is arguably one of the best college rim protectors ever, and Castle was an easy one-and-done NBA prospect. Point guard Tristen Newton, the Huskies’ third NBA Draft choice on the roster, was a consensus first-team All-American and a returning starter from the 2023 UConn title team. Forward Alex Karaban was also a key starter on that 2023 team, and shooting guard Cam Spencer posted the highest individual offensive rating in the country (per KenPom).