Which of the following measures is used to show the ratio of defects to units?

The correct answer is A. DPU. DPU (Defects Per Unit) is the correct answer because it is defined precisely as the total number of defects divided by the total number of units inspected - a direct ratio of defects to units. DPO (Defects Per Opportunity) is wrong because it divides defects by the number of…

Measure Phase

Question

Options

ADPU
BDPO
CDPMO
DPPM

How the community answered

(23 responses)

A
91% (21)
B
4% (1)
C
4% (1)

Explanation

DPU (Defects Per Unit) is the correct answer because it is defined precisely as the total number of defects divided by the total number of units inspected - a direct ratio of defects to units. DPO (Defects Per Opportunity) is wrong because it divides defects by the number of opportunities for a defect to occur, not by units. DPMO (Defects Per Million Opportunities) extends DPO by scaling to one million opportunities, making it useful for very low defect rates but still opportunity-based, not unit-based. PPM (Parts Per Million) expresses defects on a per-million-parts scale and is often used interchangeably with DPMO in some contexts, but it is not the standard term for the simple defects-to-units ratio.

Memory tip: Think of the "U" in DPU as "Unit" - if the question mentions units, DPU is your answer. If you see opportunities, think DPO or DPMO.

Topics

#DPU#defects per unit#quality metrics#process performance measures

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