So I took my package to one of the MC who sat the board last year for advise and this is what he also told me below about Looking even further past the last 5 years.....
They chose a couple sailors who were somewhat junior and records that seemed to be just on point but most likely didn’t have a lot of E6 evals due to their TIR. One guy he told me they looked at and couldn’t believe the guy package (it was great) and the few evals he had. So they looked back all the way through his records while he was a second class and even third and this guy performance was unbeliveabe through out his career. This person I do know, did get picked up and it was his first time up for Chief. I also worked with someone else and this was their first time up with 2 E6 evals #1MP on their first and #2 EP on their second and also was picked up. So I guess TIR could play a big factor for looking back past 5 years just to see how you ranked against your peers a little more. But hey you never really know since the same people don’t sit the board every year and someone always tell you something different from the next person.
Good luck!!!