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Schedules are the backbone of construction animationssimulations. Project Construction of project geometry is bound to and animated simulated using task durations in the schedule. Vehicle operations are also excecuted based on schedule data.

By default, the construction simulation is controlled by planned durations. There are four sets of durations, start and end columns in the schedule and each baseline. These sets durations and dates have special relationships based on scheduling logic. The relationship between the schedule data is modeled after standardized scheduling software like Primavera P6, Asta Powerproject, and Microsoft Project.

The Duration column specifies an elapsed time for the task. It can be edited by selecting the textbox and entering a duration. Durations need a unit for example: days, weeks, years.

The Start or End columns specify the start and end of the task. It can be edited by selecting the calendar icon in their associated columns. Whichever column is selected the Calendar popup appears allowing you to select the start and the end at the same time.

Depending on the current 4D Settings the duration does may automatically update to reflect the difference between the start and end for each set of dates. However a user may want to disable the schedule logic to ensure that all durations and dates are preserved when importing. There are multiple ways to control how these are updated and whether they are matching.

The Auto Fill Duration check box ensures that the duration reflects the difference between the start and end.

The Manually Schedule Tasks checkbox toggles whether the Remaining, Actual, Planned and Start / End dates follow scheduling logic. By default, it is off to ensure that user created schedules are sensible. However, it can be turned on if importing from authoring software that does not have scheduling logic.

Recalculates the schedule based on its associated logic. This setting is only available with Manually Schedule Tasks turned off.