Measuring developer productivity in software development is a complex but crucial aspect for many tech companies aiming to deliver high-quality software efficiently. Traditional metrics like lines of code have become inadequate, prompting leaders like Google, Amazon, and Facebook to adopt more nuanced, data-driven strategies to evaluate productivity. These strategies focus on factors such as code quality, development speed, collaboration, and job satisfaction. Google, in particular, employs a comprehensive approach using the Goals/Signals/Metrics framework, emphasizing code review processes, automated testing, and internal tools like Blaze to streamline workflows. Google prioritizes high code review standards and fast turnaround times to ensure code quality and consistency. They also track metrics such as test coverage and time-to-production to identify bottlenecks and enhance workflow efficiency, while leveraging machine learning for code completion to reduce coding iteration time. Overall, by focusing on outcome-driven productivity rather than output, Google and similar companies aim to foster environments that maximize developer efficiency and effectiveness.