The Teal Book is underpinned by the principles required by the Government Functional Standard for Project Delivery. These principles are:
- universal as they apply to every portfolio, programme or project
- validated as they have been proven in practice over many years
- empowering as they give project delivery professionals the ability to influence and shape how project delivery in government is directed and managed
The principles apply to everything in project delivery and set the direction for the way the practices are implemented in real-life. They also form the framework for situations where the standard does not cover a specific need or situation.