➤ When might the defective count for 100 million transactions differ from 340?
The defective count can differ if you change the defect definition, count multiple opportunities per transaction, or ignore the 1.5‑sigma shift. Measurement errors, sampling bias, and rare‑event clustering also alter observed defect counts. Recalculate using the specific DPMO, opportunities per unit, or empirical defect rate for accurate estimates.
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