How do you handle invoices on quantity and price holds?

We have explored various options on 11.5.10 and 12.1.3 in terms of invoice on quantity and price hold but keep returning to using Alert Manager. For example we looked at the invoice on hold workflow in R12 but didn't like the fact that it looks like someone can release an invoice on a quantity hold without having to take any sort of receipting action. It may be we did not explore this option enough.

Alerts are particularly useful in terms of price holds as it gives the flexibility to split them up between external & catalog to our Procurement team and non-catalog to our requesters. In addition they can be scheduled to run on a daily, weekly, monthly basis meaning little or no interaction is needed from a sysadmin side. The only issue is that the outputs are quite basic so we have ended up combining the output into one text string separated by semi-colons to allow people to use the text to columns functionality in Excel.