Working Backwards: Insights, Stories, and Secrets from Inside Amazon

by Colin Bryar

A two-pizza team will: Be small. No more than ten people. Be autonomous. They should have no need to coordinate with other teams to get their work done. With the new service-based software architecture in place, any team could simply refer to the published application programming interfaces (APIs) for other teams. (More on this new software architecture to follow.) Be evaluated by a well-defined “fitness function.” This is the sum of a weighted series of metrics. Example: a team that is in charge of adding selection in a product category might be evaluated on: a) how many new distinct items were added for the period (50 percent weighting) b) how many units of those new distinct items were sold (30 percent weighting) c) how many page views those distinct items received (20 percent weighting) Be monitored in real time. A team’s real-time score on its fitness function would be displayed on a dashboard next to all the other two-pizza teams’ scores. Be the business owner. The team will own and be responsible for all aspects of its area of focus, including design, technology, and business results. This paradigm shift eliminates the all-too-often heard excuses such as, “We built what the business folks asked us to, they just asked for the wrong product,” or “If the tech team had actually delivered what we asked for and did it on time, we would have hit our numbers.” Be led by a multidisciplined top-flight leader. The leader must have deep technical expertise, know how to hire ...