Every business is now a digital business. Companies are scrambling to respond to consumers' higher expectations and nimbler competitors. Application development and delivery (AD&D) organizations are leading this response, transforming their processes and skills to deliver high-quality innovative software solutions that delight customers and outpace competitors. This report introduces Forrester's modern application delivery (MAD) playbook, which lays out the crucial imperatives for AD&D leaders navigating this transition. This is an update of a previously published report; Forrester reviews and revises it periodically for continued relevance and accuracy.