Robust Inference for Step-Stress Accelerated Life Tests under Interval Censoring
Reliability experiments are necessary to determine the characteristics of product lifetimes, enabling manufacturers to make informed decisions regarding product control, replacement, and maintenance. However, modern products often exhibit high reliability with long lifetimes to failure. Consequently...
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| Format: | doctoral thesis |
| Publication Date: | 2025 |
| Country: | España |
| Institution: | Universidad Complutense de Madrid (UCM) |
| Repository: | Docta Complutense |
| Language: | English |
| OAI Identifier: | oai:docta.ucm.es:20.500.14352/115169 |
| Online Access: | https://hdl.handle.net/20.500.14352/115169 |
| Access Level: | Open access |
| Keyword: | 519.248(043.2) Fiabilidad Matemáticas (Matemáticas) 12 Matemáticas |
| Summary: | Reliability experiments are necessary to determine the characteristics of product lifetimes, enabling manufacturers to make informed decisions regarding product control, replacement, and maintenance. However, modern products often exhibit high reliability with long lifetimes to failure. Consequently, conducting experiments under normal operating conditions may require quite lengthy experimental times to gather sufficient information for accurate inference, leading to potentially high experimentation costs. As an alternative, accelerated life-tests induce more failures during the experimentation by subjecting the units under test to increased stress, simulating wear and tear and causing early failure. For instance, testing electronic components at high temperatures can simulate years of use in a shorter time frame, high humidity levels can accelerate corrosion and degradation of materials, and electronic components can be subjected to voltage and current levels beyond their specifications to simulate prolonged use and potential failures. Among the different accelerated life-test designs, in step-stress tests, the stress level to which units are subjected is increased at certain pre-fixed times, and maintained constant between subsequent times of change... |
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