In larger organizations, enforcing specific rules or processes sort of standardizing the way teams work can be a challenge. The first thing that I recommend is have an intake process. Come up with something that says work coming from phone, from slack, from Jira and so on. You have to have a process by which you can bring them into somewhere of your choosing where it's visible. Now you can start to get data.
In this interview, Mojtaba Hosseini (Director of Engineering at Zapier) talks about how to approach using metrics, pitfalls teams run into, and the common evolution teams go through as they adopt metrics.