What specific metrics in JIRA(no external plugins) are available to track Business analysts work

[Ash]

what specific type of metric is available in jira (without using external plugin) to understand BA performance and find opportunities for improvement

[John Funk]

Hey Ash, 

You have asked this same question several times in a variety of ways. You need to be very specific with your questions here, and not open ended very high level questions. This is a user community for Jira, not project management in general. So we can't teach project management here and all of facets of how that should be done. You should work through your process, make decisions how you are going to operate and then ask specific questions here if you need help with that item please.