This study brings to light evidence on the benefits of a methodology for evaluation of organizational communication processes and outcomes—the ICA Communication Audit. The audit procedure was developed and tested by ICA (International Communication Association) Division IV, between 1974–1974. Sixteen field tests of the audit have been conducted from 1974–1977. This study undertook an “after” survey of the 16 audited organizations to determine the degree to which the audit was perceived to improve organizational communication effectiveness as well as overall organizational effectiveness. The findings confirmed the ICA Communication Audit as a valid diagnostic methodology and organization development intervention technique which improved both communication awareness and processes in a majority of audited orga