Study · Engineering briefing · 2003
The warning that sat in the smallest type
Boeing's January 2003 debris assessment for NASA after the foam strike on Space Shuttle Columbia (STS-107). Source: archived NASA copy of the briefing (PDF).
Reconstruction. Bullet levels follow the original; some middle bullets are shortened.
- 1The title argues against its own data"Conservatism" tells a manager the model errs on the safe side. The slide's last bullet says the model doesn't apply to this case at all.
- 2The finding that matters is buried"Outside of test database" sits two levels down. Nested bullets rank ideas by indentation, so the decisive point looks like a footnote.
- 3A 640× gap reads as a minor detail1,920 cubic inches against 3 is a 640-fold jump past anything tested. It appears as a raw comparison in the smallest type on the slide, with no ratio and no consequence.
- 4One word stretched over four very different sizes"Significant" describes a modelling error, an energy threshold, tile damage and a gap far outside the data. It stops telling the reader how big anything is.
What changed
The headline now carries the finding the original buried. The two volumes are drawn to one scale, so the gap is something you see, not something you read. The test bar is barely a hairline, and that is the point.
The supporting logic shrinks to three short columns in reading order. The last column, the one a decision depends on, gets the accent color.