Over the years I’ve seen hundreds of different statistics, most of them interesting, some of them useful. The one statistic I have never seen or heard of anyone using is the ‘opponent’s attack percentage’. I always look at it from match to match out of interest, but have never systematically followed it. In the NBA they talk about it often as a measure of the defensive performance of a team. That should hold for volleyball as well.
Thinking about it, it occurs to me that in volleyball the opponent’s attack percentage (OAP) should be a good measure of the ability of a team’s block (and to a lesser degree defence) to disrupt the attack. Point scoring percentage measures serve/block/defence/transition attack.
OAP definitely doesn’t include transition attack or service aces, but does it accurately block effectiveness?