Reliability, systems thinking, and what we find while building.
Ten of the thirty-eight causal factors, ranked by the number of public incidents each appears in, across 1,287 incidents from 139 organizations. A reference for deciding where reliability effort goes, with the counting rules and the known biases stated alongside it.
All 38 contributing conditions in the first edition of the catalog, grouped into seven categories. Every entry has a stable CF identifier and its own link, so you can cite it.
Reliability has had outage taxonomies since 2003 and none became a shared vocabulary. This is an argument about why the earlier attempts didn't take hold, and the method behind a 38-entry catalog of contributing conditions based off of public incident disclosure data.