Quota systems and discretionary bonuses.
With this mechanism, the principal sets a number of performancemetrics thresholds.
When agents reach a threshold they are given a one-off bonus.
Quota systems evaluate whether a performance signal surpasses a threshold at predefined points in time (such as annual bonuses).
On the other hand,discretionary bonuses may be paid
whenever an agent achieves a performance level for the first time (such as a preset number of customers)