Why it matters: a panel mismatch can create a coordination gap before the field discovers it.
Electrical sets describe the same panels in more than one place. When a panel is renamed, added or removed late in design, the panel diagrams and the one-line diagram drift apart, and nobody notices until someone in the field asks which one is right. MarkedUp checks the panels in both directions so each mismatch is flagged with its sheet references before pricing or construction.