Guidelines for creating metrics for a SOC

Hello everyone, first post (not just here, but ever created account today), long time lurker. I don't think I've seen anything like this posted here but figured I'd ask anyway.

Does anybody knew of any guidelines, reading material (books, ebooks etc, price not important), philosophy, framework etc around implementing a system for reporting and metrics for a SOC? Basically there was a lot of personnel changes before I was hired on and we're trying to find ways to measure how …

cybersecurity guidelines metrics soc