Sketchup Virtual Builder Light is a plugin that insert the aspect 'Time-Scheduling-Planning' in Google Sketchup.
Start and enddates can be attached to Sketchup entities along with additional information (like construction type: construction-demolition-...)
By navigating in time (by milestone, month, quarter, year, etc) in Sketchup the construction process of the Sketchup model is shown (Construction scheduling).
It enables an early view on the scheduling of the project without the need of a Scheduling software: all information is stored in the Sketchup file.