Stats — basics
Open the Stats page
Open a match card and choose Stats, or tap View detailed stats from the results screen. Use the set filter to show the whole match or one set.
Efficiency and impact
Efficiency per attempt
Efficiency per attempt is a weighted average of recorded evaluations. A positive result adds value, a negative result subtracts value, and the total is divided by the number of attempts.
It answers: How good was the average attempt?
Impact per set
Impact per set combines efficiency with volume. A player who maintains quality while taking more useful actions will generally have a larger value.
It answers: How much did the player contribute per set?
Team-specific weights
ATaMa volley's weighted metric is based on graded volleyball actions, but it is not the single traditional attack-efficiency formula. Administrators and editors can adjust evaluation weights to match the team's priorities.
Player view
Choose an action tab such as Serve, Reception, or Attack. Each row shows a player, evaluation counts, attempts, efficiency per attempt, and impact per set.
- Compare efficiency only when players have enough attempts.
- Use impact to see the combination of quality and workload.
- Tap the information button for the exact metric explanation.
Compare players on the scatter plot
Below the player table, a scatter plot compares players at a glance. The Y axis is always efficiency per attempt (the same value as the table). The X axis depends on the action tab: points won after serve (%) on the Serve tab, and attempts per set on Reception and the attack tabs. Tap the i button for an illustrated guide.
By default the axes zoom to where the points are, so differences stay visible even when players are close together. That means zero can fall outside the visible range (for example when everyone is positive). The zero line is drawn only when zero is inside the range, so read the actual values from the axis ticks.
Switch Filters → Display → Scatter plot axes to Zero-based to go back to a symmetric axis centered on zero.
Show per-set spread
Tick Spread at the top right of the plot to overlay each player's set-by-set efficiency as a vertical box-and-whisker:
- Thick blue bar — the middle half of their sets (first to third quartile).
- Blue dashed lines — the whiskers: their best and worst sets, excluding extremes.
- Hollow blue circle — an outlier set.
The dot stays where it was, at the efficiency across all sets, so it still matches the table.
Two players with the same efficiency can look very different here: a short bar means they deliver every set, while a long one means the level swings. Build around the steady player, and use match notes or the rotation view to find what happens in the sets where the other one drops.
Only players with at least two sets of data are shown. The checkbox does not appear when the set filter narrows the view to a single set, and the spread is not available in reception-attack mode.
Tap the i button on the plot and then the right arrow to reach a second page, About the spread, with an illustrated walkthrough.
Rotation view
Rotation view compares all six serve-order rotations. Important rates include:
- Sideout %: points won while receiving serve
- Break %: points won while serving
Use the team total as a baseline, then open a rotation row to see which players and actions drove the difference.
Team and opponent rows
The team row aggregates your recorded actions. Opponent values may be derived from the outcomes recorded from your team's point of view unless a dedicated opponent-analysis match is linked.
Continue to Stats: advanced for rally analysis, player-by-rotation heatmaps, comparisons, exports, and weight settings.