Briefly describe the four categories of the Darnall-Preston Complexity Index DPCI).

The Darnall-Preston Complexity Index DPCI) is designed to develop a project profile that reflects different aspects of the project that will influence the approach to leading and executing the project. The DPCI is built on four categories of attributes:
External: Environmental attributes that are in existence at the beginning of the project, such as size, duration, and available resources
Internal: Clarity of project objectives, the clarity of scope, the organizational complexity, and stakeholder agreement
Technological: Newness of the technology and familiarity of team members with the technology
Environmental: Legal, cultural, political, and ecological