Network analysis is one of the instruments in the communication audit toolbox to diagnose communication problems within organizations. To explore its contribution to a communication audit, the authors conducted a network analysis within three secondary schools, comparing its results with those of two other instruments: interviews focusing on critical incidents and a communication satisfaction questionnaire. The results show that network analysis may complement interview and survey data in several ways, by uncovering unique problems or by explaining or corroborating problems that were uncovered by the critical incidents or the survey. The results also show that additional data are sometimes needed to make sense of network characteristics.