Universal Container uses Service Cloud with a custom field, stage_c, on the Case object. Management wants to send a follow-up email reminder 6 hours after the stage_c field is set to `';Waiting on cus

A Scheduled Flow can be used to process a batch of records that meet criteria for time-based actions, making it suitable for bulk processing of records that were updated X hours ago.

Einstein Next Best Action is a recommendation engine that suggests strategies to users and is not designed for automated, time-based email reminders.

A Record-Triggered Flow can initiate when the `stage_c` field is updated to 'Waiting on customer' and then include a scheduled path to execute the email reminder 6 hours later, which is inherently bulk-safe.

Process Builder, while capable of time-based actions, is being deprecated, and Salesforce recommends using Record-Triggered Flows for new automation, which are more efficient and robust.