For CMMI practices to be effective, does an organization need a process for each Capability Area?

An organization does not need a process for each Capability Area for CMMI practices to be effective. CMMI (Capability Maturity Model Integration) encourages organizations to establish processes that are tailored to their specific needs and goals, rather than mandating a set number of processes for each Capability Area.

The focus of CMMI is on process improvement and achieving maturity within the processes that are implemented. As such, it's more important for organizations to implement processes that align with their unique objectives and operational context. This results in a more agile and effective approach to improving performance and managing processes.

The flexibility inherent in CMMI allows organizations to emphasize areas that are critical for their success, rather than being constrained by the need to cover every Capability Area uniformly. Hence, organizations can prioritize and select specific processes that will yield the most value, which underlines why a complete process for each Capability Area is not a requirement for successful CMMI implementation.