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Supply chain · Measurement
The bouquets got better and sales fell
Shelf life went from half a week to 14–21 days and sales fell anyway. Customers could see the size of a bouquet. They could not see the freshness.
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Supply chain · Measurement
You cannot count the sale you did not make
Sales data records what you sold, not what people wanted. The two differ exactly on the days they matter most, and the gap teaches a forecast to shrink.
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Coding theory · Supply chain
A scratched label still scans, and that is not luck
A check digit tells you a barcode scan was wrong. Reed–Solomon parity tells you what it should have been. That difference decides what a damaged label costs.
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Machine learning · Supply chain
My model scored perfect and that was the problem
A perfect held-out score measured one thing: whether the model could repeat what it had seen. Of 30 cross-family tests, 20 fell below a crude baseline.