So I found this useful article on the amazon forums regarding the new health metric
All new sellers start with a score of 200.
Because they have no sales and no violations.
200 is the baseline
Points are …
deducted from your AHR score each time we find a new policy violation, and;
added back when you successfully address that violation.
Point values for each violation are based on severity level and typically range from 2 to 8, though critical violations automatically bring your AHR score to zero.
(I guess we’ll only know what violation is what value when sellers post them)
Also, if you violate the same policy multiple times, in some cases negative point values double per repeat violation.
To ensure your AHR is evaluated in context of the size of your business, you also gain 4 points for every 200 successful orders you fulfilled over the last 180 days.
Bottom line: we all start at 200 and work our way up!
532 could = No violations; 16,600+ successful orders within the 180 days
311 (odd for no issues) could = (seemingly a violation for 1 point); 5600+ successful orders within the 180 days
244 could = No violations; 2200+ successful orders within the 180 days