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Expected total elapsed time between the earliest and latest timestamps in a case belonging to a group of cases. Also known as cycle time.

Event log is associated with a process in which the total elapsed time of a case is of relevance.

Minimizing lead time is desirable.

actinst
case
time
type

Formula for practitioners

$\frac{\sum_{c \in g} \mathit{LT}(c)}{\mathit{C}(g)}$

$\mathit{LT}(c)$ returns the lead time of case $c$.
$\mathit{C}(g)$ returns the total number of cases in group $g$.
The numerator $\sum_{c \in g} \mathit{LT}(c)$ sums the lead times of all cases in $g$.