PPI Repository

Sum of elapsed time between the start event of an activity instance and the complete event of the activity instance that precedes it, for all the instantiations of a specific activity in the event log.

Event log in which the time spent between every activity instance is of relevance.

Minimizing waiting time is desirable.

act
actinst
case
time
type

Formula for practitioners

$\sum _{i \in \mathit{inst}(a)} \mathit{WT}(i)$

$\mathit{inst}(a)$ returns the set of all instances of activity $a$.
$\mathit{WT}(i)$ returns the waiting time of activity instance $i$.