Synopsis.
Name
The New Normal. An anomaly appears that was never supposed to, and nothing bad happens ... so it is rated acceptable, and the next one is measured against it and not against the spec, and success by success the line of what is normal creeps out to meet the thing that will finally fail.
Arc
The bend is this: tolerate a deviation once and it becomes the standard the next one is judged against. It runs on a split between the original limit and the last thing that worked. A signal crosses the line the design drew, and the system flies anyway, and the flight is a success. So the signal is reclassified: not a failure, within experience, acceptable. The next signal is larger, and it is measured against the last success rather than the spec, and it flies too. The boundary of acceptable is redrawn to wherever the evidence last stopped, and the evidence is only ever the times it did not break yet. Each decision is data-driven and locally sound, and the baseline drifts the whole time, until the deviation that was never allowed is routine and one day does what it always could. Reset the line to the spec, treat the signal as a signal, and the drift stops: what you accept as normal once is what you will measure everything against.
Stakes
Whether a limit is ever measured against its spec, or only ever against the last time it held. Every plot but the last moves the same way: toward the most recent success, which each new signal is judged against, and away from the original line, which no one has looked at in years. The production cannot make a system fail on a schedule, so every deviation looks survivable right up to the one that is not. It can only show that every call was data-driven and locally sound, that no one chose to court disaster, and that the single thing that would have held the line, treating a signal as a signal and measuring it against the spec, is the discipline that each quiet success made easier to drop.
Estate
khai-misfits: the house that holds this production and answers for the whole run.