Webinar
A technical distinction between HALT and ALT, including acceleration models, failure mechanisms and limits of interpretation.
The similar names Highly Accelerated Life Test (HALT) and Accelerated Life Test (ALT) can create misleading expectations. The webinar establishes a common technical basis and explains which question each test can actually answer.
HALT is primarily used to reveal robustness limits and weak points early. ALT, in contrast, is intended to produce time-dependent failures more quickly under increased but physically justified stress and to enable a quantitative transfer to service conditions. A HALT result is therefore not automatically a statistical lifetime demonstration.
Acceleration is meaningful only while the relevant failure mechanism remains unchanged. Excessive temperature, vibration or load may activate artefacts that would not occur in service. Test levels must therefore be derived from product physics, usage and the intended statement rather than from the shortest possible duration.
Models such as Arrhenius, inverse power law or combined approaches translate elevated stress to service conditions. Their parameters, applicable range and uncertainty need to be documented. A precise calculation cannot compensate for an unsuitable model or an unrepresentative test condition.
A sound plan connects objective, specimen, load profile, failure criterion and evaluation before the test begins. The result can then support design changes, further testing or release decisions without claiming more than the available evidence provides.
RelTest connects test objectives, product physics, stress levels and statistical evaluation into a defensible testing strategy.
