Escalation raises unresolved service work when its configured conditions and time threshold are met. Business hours can change how the elapsed service time is calculated. An auto-response acknowledges intake; it doesn't prove that an agent has investigated or resolved the request.
Choose the mechanism that matches the requirement. Assignment rules decide ownership at an assignment event, while escalation and Flow can react to other conditions. Keep a closed case from receiving an unnecessary escalation. Check the boundary exactly at the threshold and around weekends or holidays. This local course uses checked configuration choices for hosted email and business-hour behavior, and later Flow lessons execute matching record updates without sending communications.