Asset status automatically disposed if not scanned in last X months.

I'm managing a lot of workstation, and I'd like if it would be possible to set automatically to "Disposed" all these workstation that was not been scanned with success in last n month. Can you help me?

If it is not possible, I think that could be sufficient to add to the workstation filters a field like "Last scan date", with the more recent value (for each workstation) in the field "audithistory.audittime". With this field, I would be able to filter manually the assets and I could be set to "Disposed" massively.

Thanks in advance..

Sutot