Service Maintenance and Change Management Policy. 8.1 Service Maintenance and Changes. Revvity performs changes to cloud hardware infrastructure, operating software, product software, and supporting application software to maintain operational stability, availability, security, performance, and currency of the Service. For changes that are expected to cause service interruption, Revvity will endeavor to provide prior notice of the anticipated impact. For Customer-specific changes and upgrades, Revvity will work to coordinate the maintenance periods with Customer where possible. The durations of the maintenance periods for scheduled or planned maintenance are not included in the calculation of Unplanned Downtime minutes in the quarterly measurement period for Service Availability. Revvity uses commercially reasonable efforts to minimize the use of these reserved maintenance periods and to minimize the duration of maintenance events that may cause Service interruptions.