Chapter 3 introduced the processes necessary to coordinate and support project work and assigned responsibility for them to a new line function, the PO. In practice this framework, like any other framework, must be tailored to the needs and culture of the organization in which it is going to be deployed; this can be done through the use of a responsibility matrix in which the key decisions that must be made through the life of a project are listed and responsibility for them assigned to the various stakeholders.