Which of the following actions is part of the Sustainment Restoration and Modernization (SRM) process?

Implementing updates to existing systems is a key action within the Sustainment Restoration and Modernization (SRM) process. This process focuses on ensuring that systems remain effective, efficient, and up-to-date in order to meet operational requirements. By regularly updating existing systems, organizations can enhance functionality, improve security, and ensure compliance with current standards and regulations. This ongoing maintenance and modernization effort is essential for sustaining the effectiveness of the systems over time, which aligns directly with the goals of SRM.

The other options, while important in their own contexts, do not directly relate to the SRM process. Preparing financial statements is primarily concerned with fiscal accountability and management, organizing training sessions is focused on personnel development, and documenting historical performance pertains to record-keeping and analysis rather than the direct improvement or modernization of systems. Each of these is vital for the overall success of an organization but does not fall under the specific purview of the SRM process.