Unfortunately the answer from @Ontapforrum is incorrect.
Active IQ Unified Manager 9.7 inherits the Service Level Objective Management feature formerly available in NSLM - NetApp Service Level Manager.
With this a user can *actively* provision resources, including an AQoS (adaptive QoS) and/or an efficiency policy.
Also assigning AQoS policies to pre-existing workloads (=volumes and LUNs) is possible, but should be evaluated carefully. Please review the section "Provisioning and managing workloads" in the AIQUM9.7 online help (Link to Offline Help for your reference).
In short - if you assign either a Performance Service Level, or a Storage Efficiency Policy in the AIQUM UI, it will go and alter the volume configuration to the respective AQoS and/or efficiency policy.
Be *very* careful with the blue button that reads "Assign System-Recommended PSLs" - it has a warning sign for a reason. It will go out and configure *all* volumes and LUNs with the AQoS policy AIQUM analyzed to be the best fit and override any pre-existing QoS settings for the volumes.
I deem the PSL-based provisioning and management to be a very strong feature. But you need to get your head around it as it may fundamentally change the way how you may have provisioned resources in the past.
Kind regards, Niels