REQUIRE minimum time entry

REQUIRE minimum time entry

We expect all of our tickets handled by agents to have a minimum time entry of 15 minutes. There doesn't appear to be any way to enforce this in Zoho Desk, so if an agent closes a ticket and forgets to add their time, it doesn't get caught until report auditing at the end of the month.

So... is there any way to require a minimum time entry of 15 minutes on a ticket? I can't seem to find any way to do it in workflow rules or even in Blueprint, and I'm hoping I'm missing something because this seems like a big validation type to miss in a time tracking system.