In Roman architecture the stone in which a construction project was started from was called the cornerstone or foundation stone. It was the most important because this was the stone in which all other stones would be based off of. Great care was taken in making sure that the angles were correct. If there was a slight deviation, even one degree, it could cause structural issues for a foundation. When talking about performance across the lifecycle we must start at the foundation. In my previous post we talked about the need for looking at performance not just in a single phase but in all aspects of the lifecycle. In this article we will look at the need for performance to be the cornerstone of the development process.