Root-Cause of HALT Failures -- Part I: Qualmark / DfR Solutions Webinar Series
Presented by Cheryl Tulkoff and Greg Caswell, DfR Solutions
HALT can be an important step in best practice reliability activities but its use is extremely limited without root-cause analysis. In HALT, failures are frequently treated in either a "fix and move on" or "ignore as not relevant" fashion. As a result, organizations experience significant losses from unreliable equipment and processes as they repeatedly correct rather than prevent problems. This is a reactive rather than a proactive method of solving, managing an eliminating undesirable events.
Root Cause Analysis (RCA) is a structured, systematic, analytical approach that, when used correctly, can prevent and alleviate chronic failures. When further enhanced with knowledge of common failure mechanisms, RCA can dramatically accelerate the problem solving process.
This webinar covers a case study of a classic Highly Accelerated Life Testing (HALT) activity. The HALT consisted of
• Cold Step Stress
• Hot Step Stress
• Rapid Thermal Transition
• Vibration Step Stress
• Combined Thermal and Vibration
DfR reviews each failure mode, when the failure occurred during the HALT process, and the root-cause of the failure. They also provide an assessment as to relevancy of the failure mode for the field environment and possible corrective actions.