ITPEC IP October 2018 Question 14
ITPEC IP October 2018 — Question 14 of 100
The y-axis of a bathtub curve represents failure rate. Early-life failures create the initially high and decreasing section, random failures produce the low nearly constant section, and wear-out failures cause the rate to rise late in the product's life.
Answer (a)
Why not others:
- reliability generally decreases over time rather than forming the shown bathtub shape
- MTBF is an average time interval, not the instantaneous vertical measure
- MTTR measures restoration time after failure
Key rule: The bathtub curve plots failure rate against elapsed operating time across infant-mortality, useful-life, and wear-out periods.
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