The scores that measure and indicate the driver performance in your organization is dependent on the scoring model that was selected by your administrator in MiX Fleet Manager.
Standard Scoring
If the standard (RIBAS) scoring model has been selected to measure the driving performance in your organization, the scoring is based on the following six driving events, which contribute to the overall driver performance score:
- Revving
- Idling
- Braking
- Acceleration
- Speed
- Out-of-green-band driving
These are system events and cannot be modified.
Your organization has set specific thresholds for each of these events and your score will be based on whether you trigger these driving events. The lower your score, the better your driving performance.
The weight of the violation indicates the importance of the violation in the calculation of the overall score. The duration percentages indicate the effect that duration has on the scoring of each of the six violations. The duration factor is set to the percentage in excess of which the score for the violation must be zero. The severity factor is the percentage indicating the effect that the severity of the violation has on the scoring calculation. The severity factor is set to the percentage of the violation trigger value at which the score must be zero.
How is this score calculated?
Each violation is processed for each sub trip in the selection period. Duration and severity are scored individually and then averaged. If the duration score for over speeding is 50, for example and the severity score for over speeding is 30, the score for the over speeding violation will be 40. If the factor for either duration or severity is set to zero, the score for the violation is merely the score of the non-zero factor.
Each event's score is then averaged for all sub trips, taking the duration of each sub trip into account. This means that a short sub trip will not affect the score as much as a longer sub trip. Once the scores have been calculated for each violation, the final score is calculated by averaging the violation scores, taking the weight factor into account. This is done by multiplying each violation score by its weight and then averaging the weighted scores, before dividing the weighted average score by the sum of the weight factors to give the final score.
RAG Scoring
This is the most popular scoring model. RAG scoring shows drivers with classifications of Red, Amber and Green as determined by the RAG score.
A driver’s RAG score is based on occurrences of Over Speeding, Harsh Acceleration and Harsh Braking averaged over time and distance. (The lowest score is the best score.) You can set custom RAG scoring thresholds.
Scoring is based on occurrences per 100 kilometer or miles.
Only three events are used:
- Harsh acceleration
- Harsh braking
- Over speeding, which could be a standard system event, a road speed event or tiered speed event. To read more about the different speed measures, click here.