# Introduction

Frameworks
Introduction
This chapter includes working definitions, practical tools, models, templates, and a holistic step-by-step guide to an adaptive “policy journey” approach to help you track and proactively design, deliver and manage policies end to end.
We also have included guidance on:
- evidence
- continual evaluation
- dynamic risk management
- policymaking during crises
- how to work effectively (and appropriately) with
Ministers and their offices
- how to establish effective, sustainable policy partnerships.
We encourage you to also read the Fitness chapter, so you can explore the mindsets and ways of working that best sets you (and your policy) up for success.
Understanding Public Good
Throughout this playbook, we often use the term “public good”.
It is important to clarify what we mean by the term so that everyone is speaking the same language. Public good has a very specific definition to economists. In economics, a public good is a product or service featuring non-excludability and non-rivalrous properties. This means that people can’t be stopped from consuming or using the good and that one person’s