For longer songs, 1 miss costs less but in short songs 1 miss cost a lot, that's the problem.
I think we can decide the winners like this, just like football touraments
Firstly we decide the winner by # of wins in the group
Tie breaker 1: more games won (e.g., 3:1, 2:3, 3:0 is better than 3:1, 0:3, 3:0) *
Tie breaker 2: less game conceded (e.g., 3:1, 3:1, 1:3 is better than 3:2, 1:3, 3:2)
Tie breaker 3: score/max score ratio
Tie breaker 4: Extra match (rare case)
*: We won't have a draw for both teams winning 9 matches, so the 1st place is decided before tiebreaker.
I think we can decide the winners like this, just like football touraments
Firstly we decide the winner by # of wins in the group
Tie breaker 1: more games won (e.g., 3:1, 2:3, 3:0 is better than 3:1, 0:3, 3:0) *
Tie breaker 2: less game conceded (e.g., 3:1, 3:1, 1:3 is better than 3:2, 1:3, 3:2)
Tie breaker 3: score/max score ratio
Tie breaker 4: Extra match (rare case)
*: We won't have a draw for both teams winning 9 matches, so the 1st place is decided before tiebreaker.