BuzzerBeater Forums

If the score leads significantly, using Follow Depth Chart, the starters' playing time is about 28 minutes, give or take a few minutes.
This game (129647754) is an example, the starters of my PF and C positions play 28 minutes and backups play 20 minutes.

If the score is very close or even slightly behind the opponent, then Follow Depth Chart is indeed not effective.
However, if the backup players are significantly stronger than the starters, using Coach Picks from Depth Chart might work.
For example, in this (old) game (37151492), my PG starter plays 29 minutes, and the backup plays 19 minutes.

If there is no restriction on a single position playing for 28 minutes, and the backups are close in strength to the starters, it is possible to achieve this by using Coach Picks from Depth Chart or Let Coach Decide.
In this B3 game (129757425), TWT's Z. Bevalds plays 25 minutes, and according to BBAPI, he plays 8 minutes at PG, 8 minutes at SG, and 10 minutes at SF.
I guess TWT probably set Z. Bevalds as the backup for the PG, SG, and SF positions.

I disagree that this is good or sufficient. The total minutes played by my listed starter will depend on his stamina level, skills related to the backup, and score of the game. In other words, 3 things out of my control in that specific moment. If I want to have roughly 50% split between my starter and sub then the only option is to blow out my opponent. Which depends on the skill level of my opponent and available players.

OK

In basketball games, when the scores are close, the playing time for the starters is usually longer because the coach wants the most experienced and skilled players on the court to help secure the victory for the team.
Generally, the playing time for starters ranges from about 30 to 40 minutes in a 48-minute game.
It is rare for the playing time of starters and bench players to be nearly equal.

If you say this is a special strategy aimed at preserving players' stamina for more important games, then I can accept it.