Many years ago I was introduced to Value Stream Mapping and its been a fantastic tool ever since. The idea is to look at your processes and become more lean and efficient by identifying the waste in the process. Mapping time doing actual work and the time wasted waiting for emails or meetings or another meeting after that (you know how it goes) for someone to get to a decision shows a great metric, usually along the lines of actual work 35 minutes resolution time 3 weeks. By mapping the process you can look at where the delays are and identify the areas to focus your improvements on.
Link to Atlassian’s more detailed explaination
Give it ago let me know what you think!