In the latest version of P3M3 the concept of Threads was introduced.
These are “cross cutting” concepts that help with the systemic analysis of an organisations strengths and weaknesses. It reflects the recognition that if an organisation is weak on a topic, e.g. planning, then this will have deeper consequences than just affecting project schedules.
In this video, the P3M3 lead author explains the concept and why it has been a critical development in the evolution of P3M3.