OPS™ can be used to track Time or 4D in BIM

In the settings of individual projects users can define a construction start and end date which can then be used to analyze an individual project or an entire city model with time based 4D model. This can be visualized automatically in Google Earth by exporting from OPS or linking to OPS from Google Earth. In Google Earth you can play a time based animation or drag a slider that shows the sequence of construction. This feature is useful for scenario planning and for visualizing projects from a historical point of view.

A snapshot of how the timeline shows buildings in Google Earth. Floors of a building appear as the timeline approaches the month in the 4D sequence.

The timeline can play automatically or users can drag the bar to a point in time.