Confidence grades

Grades from inputs/thresholds.md. Spread is the gap between the highest and lowest source median, relative to the lowest.
Grade	Salary	Employer contributions	Published pages
Confidence A	3 or more sources, spread within 15%	every item backed by 2 statutory sources, one of them primary	1
Confidence B	2 or more sources, spread within 30%	every item backed by at least 1 statutory source	40
Confidence C	2 or more sources, spread within 50%	1 statutory plus 1 market source	0

Grades from inputs/thresholds.md. Spread is the gap between the highest and lowest source median, relative to the lowest.

Grade

Salary

Employer contributions

Published pages

Confidence A

3 or more sources, spread within 15%

every item backed by 2 statutory sources, one of them primary

Confidence B

2 or more sources, spread within 30%

every item backed by at least 1 statutory source

Confidence C

2 or more sources, spread within 50%

1 statutory plus 1 market source

Below C, a figure is not published. A breakdown page needs salary at B or better, so a C salary never reaches a cost page; the grade C row counts zero pages by design unless a component other than salary sets it.

Independence: two sources count as independent when they come from different publishers. A second page from the same publisher is ignored. Outliers more than twice or less than half the median of the other sources are dropped with a note; two sources more than twice apart are both set aside.