This is something Ive put together to keep track of errors coming through the SSRS logs.
We capture the majority of priority errors through other methods but I find some still slip through if you’re not checking your log files regularly. It still baffles me that SSRS doesnt have better error monitoring/logging for subscriptions in particular. Even in 2016 we still use a custom SQL job to monitor & alert on failed subscriptions.
Here’s a quick overview of what Im doing with the logs: