  Managing open-source software (OSS) projects requires managing communities of
contributors. In particular, it is essential for project leaders to understand
their community's diversity and turnover. We present CommunityTapestry, a
dynamic real-time community dashboard, which presents key diversity and
turnover signals that we identified from the literature and through
participatory design sessions with stakeholders. We evaluated CommunityTapestry
with an OSS project's contributors and Project Management Committee members,
who explored the dashboard using their own project data. Our study results
demonstrate that CommunityTapestry increased participants' awareness of their
community composition and the diversity and turnover rates in the project. It
helped them identify areas of improvement and gave them actionable information.
