Designs are revised during the course of a project, and from board to board. CircuitSpace propagates changes and helps designers manage them effectively. Checkpoint reports describe a board’s current state, enumerating clusters, members, and nets. Designers can save and compare design checkpoints at any time during a design project. Comparison reports identify the difference between a checkpoint report and a board, or another check point report. Designers can review the additions to a cluster’s membership before modifying the actual cluster.