HALT – What is HALT?
• Quickly discover design issues.
• Evaluate & improve design margins.
• Release mature product at market introduction.
• Reduce development time & cost.
• Eliminate design problems before release.
• Evaluate cost reductions made to product.
Developmental HALT is not really a test you pass or fail, it is a process tool for the design engineers.
There are no pre-established limits.
In this seminar, we will cover the following areas:
• History of HALT and HASS
• What is HALT and What is Not HALT
• Basics of HALT and HASS
• Links between HALT and Design for Reliability
• Links between HALT and Design for Robustness
• New advances in equipment
• New advances in HALT methodology
• New advances in HASS Development methodology
• What % of companies are doing HALT
• What % of companies are doing HASS
• What lies in the future for HALT
• History of HALT
• New HALT Methodology/Equipment
HALT Strengths & Weaknesses
• Key question does HALT excite failure causes that the product may experience in the field?
• Depends on the characteristics of the DUT and the actual stresses in the field
• Example, if the fail causes are accelerated by Temp & Vibe, and the product experiences these in the field, then HALT results may be representative of field failure. Hence, failure analysis is critical.
• If fail causes are not accelerated by Temp & Vibe, and/or the product operates in a benign environment, then HALT will not give useful information about field reliability.
• HALT pros & cons, from RIAC Guide for Reliability.
• HALT Calculator – What is it?
• New Features of the Calculator
• HALT is used to better understand design margins and to uncover failure modes linked to field failures.
• Operating Limits and Destruct Limits are discovered which characterize normal products, similar to SPC control limits.
• These Operating & Destruct Limits are then used later on field return units to quickly identify any possible drift in product performance relative to the established control limits.
Discussion of history and lessons learned over the history of HALT testing.
Discussion of the recent improvements to the HALT AFR/MTBF Calculator
What is the AFR Estimator
It is a patent pending Excel-based mathematical model that when provided with the appropriate HALT and product information, will accurately estimate the product’s field AFR or Actual Field Failure Rate.