Case studies
Real investigations.
Every plant has one: the issue that stays open for weeks, that three people have already guessed at, that comes with almost no clue. Here are three of those, real ones, from early testing on production equipment.
Each one is retold on a different class of machine, with the documents and numbers moved along with it, so the site it happened at can’t be identified. What’s kept is the part that matters: how the issue showed up, what Cala surfaced, the check, and what turned out to be true.
Want proof that asks for no trust at all? The method is worked in the open against a public manual, where you can check every line.
The investigations
Two weeks down, and every sensor said fine.
An intermittent placement problem in one corner of the working field, slipping past inspection, on a machine that passed every check it had.
A brand-new phenomenon, and a theory that held.
A dimensional oscillation inside large dense sections that no existing explanation covered, and the experiments that pinned it down.
The data was fine. The model was wrong.
Fitting parameters that should have been constant refused to be, until the model itself went under investigation.
A real investigation from early testing on production equipment, retold on a different class of machine so the site, the tool and the people can’t be identified. The reasoning is the part that’s true.
Bring the one that's still open.
Load the manual for the tool it's on and give Cala the issue that's been sitting there with no root cause. Read the list. Check the citations against the pages they point at. See if there's something on it nobody has tried yet.