What is laddering and what advantages can be gained from its use in project management?

What will be an ideal response?

Laddering is a technique that allows us to redraw the activity network to more closely sequence the project subtasks to make the overall network sequence more efficient. Complicated activities are broken down into smaller activities by virtue of identifying milestones within them. If a successor activity can begin after the attainment of one of these milestones, then project resources can be more fully employed, project duration can be reduced and the linkage and sequencing between activities can be streamlined.