a task that must be completed before the current task can begin
a work order that must be completed before an employee can log on to the next
A job that must complete successfully before successor jobs can begin execution.
In scheduling, a task that must be begun, in progress, or completed, for another task to begin.
A task that must start or finish before another task can start or finish.
an activity that must be completed (or be partially completed) before a specified activity can begin.
An operation in an internal or external dependency that must finish successfully before its successor operation can begin.