True or False: Within a Practice Area, each evolutionary level builds on the previous levels and adds new functionality.

The statement is true because in the Capability Maturity Model Integration (CMMI), each evolutionary level within a Practice Area is designed to build upon the processes and capabilities established in previous levels. This cumulative approach means that as an organization progresses through the levels of maturity, it not only retains the functionality and processes developed previously but also integrates new practices that enhance the organization's overall capability and efficiency.

For example, the initial levels focus on basic practices and establishing foundational processes. As organizations advance to higher levels, they refine their practices and integrate more sophisticated process improvements and tools, pushing their performance forward. This layering of capabilities ensures that organizations not only become more mature but also develop a richer set of processes that promote better performance and adaptability over time. Thus, the essence of CMMI is about evolving capabilities systematically, making the statement accurate and aligning with the fundamental principles of the model.