Continuous Delivery is a concept that can help the flow from requirements to software in production. Below document describes a maturity model for it.
Nowadays a lot of companies are starting to focus on Continuous Delivery in order to streamline the process from requirements to working product in production. The article below explains in great detail and even adds continuous flow for project artifacts. An interesting read.
Jeff Sutherland has published a paper on a number of Scrum Patterns, where teams accelerate faster by finishing early.
An article describing US Federal adoption of Agile.
Hereby a nice article about the fears of users when confronted with Agile ways of working. The article also includes suggestions how to work with business users to overcome these fears.