P3M3 stands for Portfolio, Programme, and Project Management Maturity Model. It is a framework that is used to assess the maturity of an organization's portfolio, programme, and project management practices. The P3M3 model is designed to help organizations understand their current level of maturity and identify areas for improvement in their management processes. It consists of a set of criteria that are organized into three levels of maturity: basic, intermediate, and advanced. Organizations are evaluated against these criteria and are given a score that reflects their overall level of maturity. The P3M3 model can be used to guide the development of a portfolio, programme, or project management office (PMO) and to benchmark an organization's performance against industry standards.