ITPEC IP October 2022 Question 16
ITPEC IP October 2022 — Question 16 of 100
The described failure-rate pattern is the bathtub curve. Early failures decline as manufacturing defects and installation problems are eliminated. The useful-life period has a roughly constant random failure rate. Wear and aging then cause the failure rate to rise, producing a curve shaped like a bathtub.
Answer (c)
Why not others:
- a Gantt chart displays scheduled activities over time
- a reliability growth curve shows reliability improvement through testing and correction
- a radar chart compares multiple characteristics on radial axes
Key rule: The bathtub curve has decreasing, constant, and increasing failure-rate regions: infant mortality, useful life, and wear-out.
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