What is the optimal serve error rate?

Serving aggressiveness and its impact on point scoring is a frequent talking point among volleyball coaches. Is there an optimal service error rate?

Service errors vs. service points

There is a point at which service aggression is just right to achieve the highest point scoring (breakpoint) percentage, but it varies.

Looking at Serving Risk and Reward

Lots of volleyball coaches want their teams to serve tougher, but there's a trade off between winning more rallies and losing more points through higher errors.