Maintain a defined weekday hardware-replacement response for a Cisco NCS 5500 System Controller. SP-AR1-NC55SLSG provides 8x5 x next-business-day advanced hardware replacement support, making it appropriate where the controller is supported during business hours and replacement can be planned for the following business day. It is a service entitlement for the supported controller, not a controller or add-on module. Use this service where an NCS 5500 System Controller has an established weekday operations window and hardware continuity requires a named replacement response. The 8x5 designation sets the service-hours framework, while next-business-day identifies the replacement timing. That combination differs from continuous coverage or same-day replacement arrangements, so it should align with the site's incident-response policy and maintenance schedule. Advanced hardware replacement focuses the entitlement on replacement hardware handling for the supported system controller. Match the entitlement period selected for the system to the required coverage horizon. The scope is specific to the NCS 5500 System Controller, helping prevent controller support from being assigned to another NCS platform component. Deploy it as the support layer for controller hardware whose loss could affect routing-system management or control-plane operations.