In process automation, what is critical for modifying data without halting a workflow?

In process automation, local actions are critical for modifying data without halting a workflow because they allow users to interact with the application and make changes without disrupting the overall process flow. Local actions can be triggered from a specific screen within the application, enabling users to update information, make decisions, or perform tasks seamlessly. This functionality is particularly valuable as it provides a more dynamic user experience, allowing for data updates while continuing to move through the workflow without requiring the entire process to pause.

The other options do serve important roles in process automation, but they do not fulfill the core requirement of modifying data without interrupting the workflow. Decision gateways are used for routing and determining the next steps based on conditions. Optional processes allow for additional steps that can be included or excluded based on user discretion but do not explicitly focus on in-line data modification. User notifications are aimed at informing users about events in the process but do not facilitate direct changes to data within the workflow context.