Scientific evidence suggests that firms are more successful at new product development if there is greater communication among marketing, engineering, and manufacturing. This paper examines communication patterns for two matched product development teams (same manufacturer, same product development stage, similar functions and number of parts, reporting to the same divisional upper manager). The key difference between the groups is that one team used a traditional phase review process and the other used Quality Function Deployment (QFD), a product development process adopted widely at over 100 United States and Japanese firms including such large organizations as General Motors, Ford, IBM, and Procter & Gamble. The comparison is of scientific and managerial interest because QFD is often adopted to enhance crossfunctional communication. To our knowledge, this is the first head-to-head comparison of traditional U.S. product development processes with QFD.We report data collected on communication levels within functions, between functions, within the teams, within the OEM group, between the OEM and supplier groups, and between the teams and external information sources. Our data suggests that QFD enhances communication levels within the core team (marketing, engineering, manufacturing). QFD changes communication patterns from "up-over-down" flows through management to more horizontal "across" routes where core team members communicate directly with one another. The QFD team communicates more on product design, customer needs, and market information than does the phase review team. On the other hand, the QFD team communicates less on planning information and less with members of the firm external to the team. If this paucity of external communication means that the team has the information it needs for product development, and the QFD process has provided an effective means for moving the information through the team, it is a positive impact of QFD. If the result means that QFD induces team insularity, even when the team needs to reach out to external information sources, it is a cause for concern.