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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.
Generous Endorsements
“What change do I hope to see in my work, and how do I know it matters? These are two of the most important questions leaders ask themselves. Determining what desired impact we want to have can be difficult enough. Figuring out how to measure that impact, then build a framework that's sufficient enough without overwhelming non-experts like donors and board members is even harder. This book does the challenging work of simplifying the complexities of measuring what matters, and doing so in a way that will build confidence in leaders (and board members) at any experience level.” —Michael Cerna, CEO Accord Network
“Measuring, communicating, and improving your impact doesn’t have to be complicated. After evaluating thousands of organizations and advising hundreds of funders, I've found that the most effective (and attractive) organizations consistently incorporate the principles outlined in this book. I have personally evaluated the impact of the authors’ organizations in-person across East Africa and can attest to their experience and expertise. This concise book is an industry must-read and a foundational first step for any organization that wants to begin proving—and improving—its impact.” —Lane Kipp, Founder & CEO of Agape Advisors, creator of All Access and Impact Builder
“Some of the most important things in mission-driven work are also the hardest to measure. I have felt this personally as a founding partner in several fast-growing social enterprises. There is a real tension between listening and responding to the Holy Spirit and stewarding the responsibility to lead with discipline. Between celebrating powerful stories of lives changed and doing the hard work of studying the data. In Mission and Metrics, David Weekley, Missy Williams, and Peter Greer show that this tension is not something to avoid—it is something to resolve. They offer a clear, practical, and deeply encouraging path that bring these out of tension into harmony. This book will serve talented leaders of social enterprises who refuse to choose between faithfulness and effectiveness, and who long to see both flourish together."—Lloyd Reeb, CoAuthor, Sage Stage, Founding Partner Halftime 100x Forum & Ardent Mentoring
“I wholeheartedly recommend Mission and Metrics to anyone wrestling with impact measurement and management — whether a seasoned veteran or a curious newcomer. Peter, David, and Missy have achieved something quite remarkable in this book: they’ve taken a topic that is often complex and overwhelming and distilled it to the essentials that truly matter. It will help the beginner find clarity and get started; the veteran rediscover essentials they may have lost in the weeds. What I appreciate most, however, is that the book is rooted and grounded in love — not abstractly, but in the way their organizations walk out stewardship of God’s Kingdom. It reflects leaders striving to measure impact without losing heart, humility, or mission." —James Waters, PhD, Founder - Kingdom Impact Ltd
"When somebody asks me for the one book to read on monitoring and evaluation for nonprofits, this is the one that I will point them to. Mission and Metrics is a wonderfully concise, engaging, convicting, and encouraging book written in easily accessible language that covers key principles, tools, and approaches with depth, transparency, and humor. Illustrated throughout with stories and case studies, and with particular insights for Christian audiences even as it is relevant for all, this book is both a must-read primer for those just starting out and a superb refresher for those with much experience in this field." —David Bronkema, Professor, PhD in Organizational Leadership, Templeton Chair of Christian Service Through Entrepreneurship
ABOUT THE AUTHORS
Peter Greer
CEO of HOPE International, Peter serves in global leadership and has coauthored multiple books on mission, development, and faith‑based work.
David Weekley
Founder of a large private homebuilding company, David is known for his long‑standing commitment to philanthropy, leadership development, and community impact.
Missy Williams
Executive director of Seed Effect, a ministry focused on savings groups and economic empowerment, Missy has extensive experience in nonprofit leadership and global outreach.