There are four phases in the Unified Process that are defined below. The Unified Process uses an iterative approach to development, which typically means there are regular milestone releases. Since this project is 100% staffed with volunteers, VAssure will not (at least initially) be scheduling milestone releases. The reason the phases are not called “Requirements”, “Design”, “Implementation”, and “Testing” is to emphasize that all of those activities occur to varying levels throughout the project. In each phase, work activities in a variety of disciplines occur that produce various artifacts.