Highly Accelerated Life Testing HALT and Highly Accelerated Stress Screening HASS

Highly Accelerated Life Testing (HALT) and HASS

Both Highly Accelerated Life Testing (HALT) and Highly Accelerated Stress Screening (HASS) are product reliability testing processes that evaluate a product’s design limitations and manufacturing weaknesses. Both HALT and HASS testing methods are similar in approach. 

HALT is performed in testing labs on products and components during the design phase before production or manufacturing. HALT employs a stepped accelerated stress approach to identify the physical limitations of a product’s design under various stressors. HASS is performed when the product is ready for manufacturing. HASS testing has a similar testing approach as HALT to assess any weakness the product develops during the manufacturing process. 

Both tests are run to failure to acquire comprehensive data on failure modes and follow a root cause analysis approach to fix issues. Generating a HASS testing profile usually requires a previous HALT with robust product design and validation data. The type of stresses induced in HALT & HASS includes combined temperature cycling, random 6 degrees of freedom vibration, and electrical loading/monitoring.

HALT and HASS testing for accelerated life tests can help designers and engineers address critical development and manufacturing issues in advance and avoid expensive redesign costs or production costs later in the product or component’s life.

HALT and HASS Testing Performed in Laboratory

• High-temperature step stress
• Low-temperature step stress
• Vibration step stress
• Rapid thermal cycling
• Combined Environment

Common Uses of HALT and HASS testing

• HALT
  • Detect design failures
  • Detect Intermittent failures
  • Detect Built-in-Test failures
  • Detect failures caused during manufacturing
  • Component part failures
• HASS
  • Produce a reliable product
  • Reduce field failures and warranty expenses
  • Used for regular audits and screen production components
  • Improve manufacturing quality

Industries Served by Our Testing Labs

• Manufacturing
• Electronic and Electromechanical Device Assemblies
• Automotive
• Aerospace
• Military
• Transportation
• Aerospace

HALT & HASS Laboratories

• Quality Testing Services
• National Technical Systems (NTS)
• Tektronix Inc.
• Delserro Engineering Solutions
• Intertek Group Plc.
• Elite Electronic Engineering Inc.

More Details

• Fundamentals of HALT & HASS testing
• Test equipment for HALT & HASS and their applications
• HALT & HASS testing standards for printed circuits
• A comprehensive guide to HALT & HASS testing