Mission and Metrics: A Practical Guide to Measuring What Matters

by Peter Greer, Jill Heisey, David Weekley

To do good better, measure what matters.How do you know if the passion and resources poured into your organization are truly making a difference in the lives of those you serve? Mission and Metrics invites leaders of nonprofits, churches, and mission‑minded organizations into a courageous exploration of impact—moving beyond isolated success stories toward a clear understanding of typical results. Grounded in love for those we serve, this book challenges leaders to assess missional effectiveness and strengthen organizational health, aiming not only to prove impact but also to improve it.

128 pages, Paperback

Published May 12, 2026

About the author

Peter Greer is an author, speaker, and president and CEO of HOPE International, a global faith-based economic development organization serving throughout Africa, Asia, Latin America, and Eastern Europe. Peter received a B.S. in international business from Messiah University and an MPP in political and economic development from Harvard's Kennedy School.
As an advocate for the Church’s role in missions and alleviating extreme poverty, Peter has co-authored over 14 books, including The Gift of Disillusionment, Mission Drift (selected as a 2015 Book Award Winner from Christianity Today), Rooting for Rivals (selected as a 2019 Leadership Resource of the Year in Outreach magazine), The Spiritual Danger of Doing Good (selected as one of the top 40 books on poverty by WORLD magazine) and Created to Flourish. More important than his role at HOPE is his role as husband to Laurel and dad to Keith, Liliana, Myles, and London. While his sports loyalties remain in New England, Peter and his family live in Lancaster, PA.

Blog: peterkgreer.com. Twitter: @peterkgreer. Facebook: @PeterKGreer