Observations - Add Same Dashboards from Punch List
The Punch List tool on web has some great dashboard metrics including average response time, please add the same visuals in Observations tool as well.
Until dashboards are added to Observations, your best bet is to utilize our Reports tool for an average response time. When building a custom report you can create a calculated column looking at date variance between date closed and date created which will get you close to your avg response time.
Dave Chandler commented
This makes sense to truly measure performance.