上游充通大粤 SHANGHAI JIAO TONG UNIVERSITY Updating the Project Schedule Network-based planning and scheduling allows project schedules to be dynamic. Once data have been collected on the actual finish times of completed activities and the effects of any project changes, an updated project schedule can be calculated: The earliest start and finish times for the remaining, uncompleted activities are calculated by working forward through the network,but they are based on the actual finish times of completed activities and the estimated durations of the uncompleted activities.Updating the Project Schedule Network-based planning and scheduling allows project schedules to be dynamic. Once data have been collected on the actual finish times of completed activities and the effects of any project changes, an updated project schedule can be calculated: • The earliest start and finish times for the remaining, uncompleted activities are calculated by working forward through the network, but they are based on the actual finish times of completed activities and the estimated durations of the uncompleted activities