Reliability Engineering

Reliability depends on what a product must do, for how long and under which conditions. A mission profile brings together temperatures, electrical loading, duty cycles, storage, mechanical stresses and the definition of failure.

• Reliability requirements, allocation and programme development
• Design for Reliability and Physics of Failure
• FMEA, DFMEA, FMECA and fault-tree analysis
• Derating, component assessment and design reviews

Life-data analysis, reliability prediction and physical modelling answer different questions. Spacerel selects the approach around the available evidence and states the assumptions and limitations of the result.

• Weibull and other appropriate life distributions
• MTBF/FIT assessment and reliability prediction
• Arrhenius, Eyring and fatigue-based acceleration approaches
• Field-return analysis, reliability growth and statistical investigation

A prediction is not a demonstration of product life, and an acceleration factor is meaningful only when the underlying failure process remains relevant.

Test stress, duration, sample size and monitoring need to be considered together. Spacerel develops accelerated life and degradation programmes, reliability demonstration plans and screening strategies with an explicit link to the application.

• Accelerated Life Testing and degradation analysis
• Reliability Demonstration Testing
• HALT/HASS, burn-in and screening strategy
• Design of Experiments and interpretation of censored data