Modern application development (MAD) has once again pushed high-performing development teams to refocus on how they measure success. The Forrester MAD metrics framework has five key categories of metrics: quality, efficiency, engagement, progress, and the outcome of business value delivered. AI does not change those. And not all metrics are equal: Some are forward looking and help predict future outcomes, while others look backward to what happened. Thus, you can learn and improve or go back and fix. The Forrester metrics framework shares similarities with common metrics that MAD teams use, but seven best practices in this report will help accelerate effectiveness of their measurement efforts.