"At the W.K. Kellogg Foundation, we believe that evaluation is an effective management tool to both inform strategy development and track the progress and impact of strategy implementation. We have long been committed to supporting our grantees’ ability to derive and share lessons learned from their work. To that end, the foundation published the first Evaluation Handbook (The Kellogg Foundation, 1998) almost two decades ago to guide evaluation for our grantees. Since that time, as the discipline of evaluation grew and expanded, the demand for evaluation has risen. More and more nonprofit leaders and practitioners strive to design evidence-based programs, and more and more funders require their grantees to provide evidence to demonstrate the success of their funded work. The democratization of evaluation makes it necessary that evaluation is both rigorous and practical. How to achieve the balance motivated us to update the handbook. Over the years, the foundation has learned a lot from our grantees about the challenges of evaluation. This handbook is our continuous effort to demystify evaluation and facilitate its use, for the foundation’s grantees and for all organizations committed to learning and strengthening their work. It is designed for people who have little to no exposure to formal evaluation training and provides a starting point for them as they consider evaluating their work. It is intended to help them become more informed consumers of evaluation. Evaluations can be simple or extensive depending on the scope and complexity of the work being evaluated. The scope of the evaluation could potentially include a single program, a multi-site initiative, or a multifaceted strategy aimed at systems and community change. Regardless of the complexity of the effort, the basics for evaluating it remain the same and this handbook was written to impart information about these basics." (Foreword)