Product reliability

How to Conduct Effective HALT/HASS


This course presents the concept of HALT/HASS and details for implementation. Learn the basic philosophy of exposing potential design defects through testing and applying techniques to various applications. This course is taught using the information presented in IEST-RP-PR003.1: HALT and HASS and will help to clarify questions with respect to this document.


Course outline     Who should attend?     Course materials    Instructor


Course outline
  • Introduction to HALT/HASS
    • History
    • Philosophy
  • Equipment
    • Repetitive shock table
    • Electrodynamic shaker
    • Thermal chambers
  • Fixturing
    • Repetitive shock
    • Electrodynamic
    • Thermal
  • Vibration environments
    • Time histories
    • PSDs
  • Performing HALT
    • Management concerns
    • "Standard" HALT tests
    • "Margin testing"
  • Developing HASS
  • Concerns – lessons learned
  • Implementing HALT
    • Test preparation
    • Conducting the test
    • Handling failures
    • Post-test effort
    • Running HASS
Who should attend?

I need to become familiar with HALT and HASS and ways to implement it because:
  • I am a manager in product design and development and/or manufacturing
  • I am an electronic, mechanical, design, reliability, production, quality, and/or test engineer
  • I am a technician who needs to gain understanding of what is required for proper test implementation
Course materials
  • Copy of IEST-RP-PR003.1: HALT/HASS
  • Copy of PowerPoint presentation in course binder
  • Certificate of attendance for completion of CEUs
This Recommended Practice (RP) defines and describes HALT (Highly Accelerated Life Testing) and HASS (Highly Accelerated Stress Screening). This RP contains information on the philosophy behind the testing, generic examples of tests, the differences between standard testing equipment and equipment used for highly accelerated testing, fixturing considerations, alternative approaches, additional environments, and lessons learned, along with other useful information. This style of testing takes a qualitative approach (looking for the quality of the design and workmanship) rather than a quantitative one (being able to use the results to calculate length of life in service). This RP is not meant to take the place of a test specification but to be used in conjunction with a test specification or as general guidance.

Continuing Education Units: .6 CEUs

Instructor

Harry Schwab