Gantt charts

This picture illustrates Multi Project Planner's implementation of Gantt charts.
The schedule belongs to a construction company.

Planning Board of a Home Construction Company. Click for larger image.

A single project is highlighted and the interrelationships between its activities shown.

The tool tip describes the relative constraint between 'Roofing' and 'Pipes', saying that

  • 'Roofing' most finish no sooner that 5 days before 'Pipes' starts.
  • 'Roofing' most finish no later than the day 'Pipes' starts.

When dragging the project along the plan, the relative constraints are respected, ie when 'Roofing' meets an obstacle it will rest until the span between it and 'Pipes' reaches 5 working days, at which point it will start moving again.

The video Moving a project illustrates the point.

This set of use cases give you an idea of the effect of relative constraints.