A network diagram is the only project management tool that shows project slack (aka: float). A task's or milestone's slack is the time that the activity can be delayed without impacting the project end date. Hive actions already include parameters for all data required to construct and industry-standard network diagram; including action name, action duration, and dependancies. The new network diagram should include the critical path, early-start, early-finish, late-start-late-finish, slack, and total project duration. For simplicity, Hive could limit the node type to only milestones. A sample project description is attached with the associated network diagram. I and my students are available to help develop this.