user295: What are things what need to fall into place for us to graduate out of Beta? Also what have aspects have we achived?
What are things what KPI do we have to meet which might not have been listed in the Area51 site? Is there subjective assessments involved?
(These questions are a follow-on from the comments under this answer.)

user254: A change to StackExchange's policy towards beta sites was announced earlier this year:

Graduation, site closure, and a clearer outlook on the health of SE sites

Community Managers haven't posted here (on this site), and I don't know whether they still try to judge sites as they used to, but here FYI is a Community Manager's posting on another site (CodeReview.SE in 2013) before it graduated ...

How is Code Review doing right now?

... and here are some follow-up topics which show how the CodeReview.SE community responded to that feedback ...

100 days later: what's up?
Call of Duty - We're on a mission
Stack Exchange Data Explorer is up. What now, Wonderland?

Note this answer especially.
One of the things Grace said was that a graduated site site shouldn't have too many low-reputation users. If I recall correctly, the more low-reputation users and the more traffic it has, the more high-reputation users it should also have.
The meanings of reputation levels change when a site graduates, for example compare Buddhism's (in beta) with Code Review's (graduated).
One of the metrics to consider (i.e. which community managers either still consider, or which they used to consider) is the number of users with a reputation of over 3000 ... because that's the reputation required to cast close votes when the site is graduated (currently equivalent to 500 on a beta site). I think they assume that on a busy, graduated site there will be off-topic and duplicate questions which need closing, and that there should be a community (of several active users with a reputation over 3000) who will do that, without relying on the moderators to do it.

295: <p>What are things what need to fall into place for us to graduate out of Beta? Also what have aspects have we achived?</p>

<p>What are things what KPI do we have to meet which might not have been listed in the Area51 site? Is there subjective assessments involved?</p>

<p>(These questions are a follow-on from <a href="https://buddhism.stackexchange.com/a/13220/254">the comments under this answer</a>.)</p>
 254: <p>A change to StackExchange's policy towards beta sites was announced earlier this year:</p>

<ul>
<li><a href="https://meta.stackexchange.com/q/257614/139866">Graduation, site closure, and a clearer outlook on the health of SE sites</a></li>
</ul>

<p>Community Managers haven't posted here (on this site), and I don't know whether they still try to judge sites as they used to, but here FYI is a Community Manager's posting on another site (CodeReview.SE in 2013) before it graduated ...</p>

<ul>
<li><a href="https://codereview.meta.stackexchange.com/q/991/34757">How is Code Review doing right now?</a></li>
</ul>

<p>... and here are some follow-up topics which show how the CodeReview.SE community responded to that feedback ...</p>

<ul>
<li><p><a href="https://codereview.meta.stackexchange.com/q/1567/34757">100 days later: what's up?</a></p></li>
<li><p><a href="https://codereview.meta.stackexchange.com/q/999/34757">Call of Duty - We're on a mission</a></p></li>
<li><p><a href="https://codereview.meta.stackexchange.com/q/1429/34757">Stack Exchange Data Explorer is up. What now, Wonderland?</a></p></li>
</ul>

<p>Note <a href="https://codereview.meta.stackexchange.com/a/1432/34757">this answer</a> especially.</p>

<p>One of the things Grace said was that a graduated site site shouldn't have too many low-reputation users. If I recall correctly, the more low-reputation users and the more traffic it has, the more high-reputation users it should also have.</p>

<p>The meanings of reputation levels change when a site graduates, for example compare <a href="https://buddhism.stackexchange.com/help/privileges">Buddhism's (in beta)</a> with <a href="https://codereview.stackexchange.com/help/privileges">Code Review's (graduated)</a>.</p>

<p>One of the metrics to consider (i.e. which community managers either still consider, or which they used to consider) is the number of users with a reputation of over 3000 ... because that's the reputation required to cast close votes when the site is graduated (currently equivalent to 500 on a beta site). I think they assume that on a busy, graduated site there will be off-topic and duplicate questions which need closing, and that there should be a community (of several active users with a reputation over 3000) who will do that, without relying on the moderators to do it.</p>
