An addition can be informative material, a specific practice, a specific goal, or a process area that extends the scope of a model or emphasizes a particular aspect of its use. In this document, all additions apply to IPPD.

An example of an addition is the one from the Organizational Training process area that appears after specific goal 1, “Establish an Organizational Training Capability.” The addition states “Cross-functional training, leadership training, interpersonal skills training, and training in the skills needed to integrate appropriate business and technical functions is needed by integrated team members. The potentially wider range of requirements and participant backgrounds may require relevant stakeholders who were not involved in requirements development to take cross training in the disciplines involved in product design in order to commit to requirements with a full understanding of the range of requirements and their interrelationships.”