Parts matrix: Parts Matrix Benchmark

Every row is a verbatim sentence read from the named source's own page through our fetch service on the date shown, hash-pinned to the stored read (the sha of the page's visible text; the raw page is mirrored to R2).

5 of the 24 named sources that could be read published a usable figure; 19 published none and are recorded as not published, never filled in; 0 could not be read (blocked, dead or unreachable) and count nowhere.

The headline figures (median, minimum, maximum, quartiles) are over ONE figure per source in % (a source's median where its page yielded several accepted sentences), so N counts sources, never sentences; 66 candidate sentence(s) were refused by a reviewer with the reason recorded.

The fuller derivation this dataset is chartered to grow into (not yet what the figures above are; they are each source's own published figure as read): one row per published matrix: the cost bands and the markup or margin each band applies, from the shop-management vendors' own setup documentation and the consultancies' published matrices, plus each publisher's stated parts gross-profit benchmark and the sample it rests on; the derived figures are the median markup at each cost band ACROSS publishers, the spread between the most and least aggressive matrix at the same band, and the gap between the published benchmark and the rate the surveys report shops achieving - no one publishes the cross-publisher matrix, only their own

66 candidate sentences on these pages were refused by a reviewer; each refusal and its reason is recorded in the review ledger.