Spiel-wirksamkeits-index (SWI)
Meaning
Estimation for the overall performance of a field player. Developed by long-time Handball-Bundesliga coach Dr. Rolf Brack and published in his habilitation thesis in 2000.
Calculation
The following points are awarded:
| Long distance goal | +1.0 |
| Forced 2 min penalty | +0.7 |
| Close distance goal | +0.6 |
| Goal prevented by helping out | +0.5 |
| Assist that leads to a shot attempt | +0.4 |
| Blocked shot | +0.4 |
| Received 7m penalty shot | +0.4 |
| Steal | +0.4 |
| Foul, that doesn‘t lead to a yellow card, 2 min penalty or red card | +0.2 |
| Unsuccessful block | -0.4 |
| Turnover | -0.4 |
| Unsuccessful long distance attempt | -0.4 |
| Unsuccessful close distance | -0.6 |
| Yellow card or 2 min penalty | -0.8 |
| Incorrect handover/takeover that leads to a shot attempt | -0.8 |
| Lost duel | -0.8 |
| Caused 7m penalty shot | -0.8 |
Based on this for offence and defence the ratings are calculated and adjusted to 30 minutes playing time for both:
SWI defence = SWI points for defence * 30 minutes / playing time in defence
SWI offence = SWI points for offence * 30 minutes / playing time in defence
SWI = SWI defence + SWI offence
Interpretation
The higher the SWI the better was the player. Offence and defence can be looked at separately.
The weightings for the events are debateable, but the metric itself is the most comprehensive since it includes more events than any other similar metric. However, it also requires more data than usually available. Thus, it is usually not applicable without additional manual tracking.