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How can a product pass inspection while its process looks wrong?

A measurement can meet the product specification yet look unusual for the process that produced it. Specification limits describe requirements; control limits describe expected process variation under the model used. The two comparisons answer different questions, so passing one does not automatically settle the other.

5–7 min

Questions you could explore

  • What might an unusual but acceptable measurement prompt someone to investigate?

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Business

How a profitable business runs short of cash

A business can record a profitable sale before its customer pays. Bills may come due in the meantime, making the timing of cash a different question from whether trading earned a profit.

8–10 min

How a profitable business runs short of cash

Business8–10 minA business can record a profitable sale before its customer pays. Bills may come due in the meantime, making the timing of cash a different question from whether trading earned a profit.

Business

Why doesn’t a factory always reach its rated output?

A machine's maximum running speed does not tell you how many usable products leave a factory. Stoppages, changeovers, and rejected output can create a gap between a capacity claim and an actual day's production.

4–5 min

Why doesn’t a factory always reach its rated output?

Business4–5 minA machine's maximum running speed does not tell you how many usable products leave a factory. Stoppages, changeovers, and rejected output can create a gap between a capacity claim and an actual day's production.

Why does one transaction change two sides of the accounts?

Business3–5 minBuying equipment changes more than what a business owns. Paying cash or borrowing the money affects the rest of the accounts differently, while assets must still balance against liabilities and equity.

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