Which tier in the SP 800-37 RMF organization structure focuses on the entire organization?

The tier that focuses on the entire organization in the SP 800-37 Risk Management Framework (RMF) is indeed Tier 1. This tier is responsible for the organizational-level risk management strategy, governance, and oversight of security and privacy risks across the entire organization.

At this level, leaders establish the risk management priorities, policies, and practices that guide the risk management process. It encompasses the overarching objectives and the alignment of risk management with the organization's goals and mission. This ensures that all lower tiers work towards the same strategic aims and adhere to the organization's standards, facilitating a cohesive approach to risk management throughout the different levels of the organization.

In contrast, Tier 2 typically focuses on the mission and business functions, helping to translate the organizational strategy into specific policies and practices for those areas. Tier 3 delves into the individual system level, concentrating on the implementation of security controls and the specific risks associated with particular information systems. Therefore, Tier 1 is essential for ensuring that risk management is not only consistent across the entire organization but also effectively supports its overall strategic objectives.