You work as an architect in a company that develops statistical studies on big data and produces reports for its customers. Analysts often allocate VMs to process data with ad hoc development procedur

You work as an architect in a company that develops statistical studies on big data and produces reports for its customers. Analysts often allocate VMs to process data with ad hoc development procedures. You have been called by the administrative department because they have been billed for a very large number of Compute Engine instances, which you also consider excessive in relation to operational needs. How can you check, without controlling them one by one, which of these systems can be accidentally left active by junior technicians?