Let's say you get a new job where you'll be working with Splunk. When you come in, you come to realize many aspects of Splunk and Splunk Enterprise Security are not being ingested properly or at all. There is little to no documentation on the current environment. How would you begin to conceptualize the environment and identify needs? What aspects of the environment would you document? Is there possibly something I didn't state that you would perform? I appreciate your time!
I suggest you look at the Inherit a Splunk Enterprise Deployment manual. It describes several steps you can take to understand and document your deployment topology, review data flow, apps, security, and more.