Course Overview

Accelerated stress testing is one of the key resources in the reliability science approach. Accelerated stress test exposures simulate product life cycles over compressed time periods by accelerating the damage accumulation rate for relevant wearout damage mechanisms. If done early in the development phase, in conjunction with reliability science design, accelerated testing can enhance process and design maturity, and enable early introduction of mature products with robust design margins. Accelerated stress exposures are also useful in the production phase to ensure process control. However, accelerated testing may not be efficient unless one understands how to select the right type of accelerated test, how to determine the testing stresses, how to understand the test results, and how to correlate the test to the field life. A reliability science approach is the key to answer these crucial questions and achieve an efficient accelerated product qualification.
Participants will learn how to make accelerated stress testing a value-added activity and use accelerated test results to take pro-active corrective measures early in the design and production phases, thus ensuring consistently high reliability and quality of design and processes.

Course Outline

1. Introduction
  • Qualification in product development
  • Purpose of qualification tests
  • Change in product certification methodology
2. Reliability Assessment Process
  • Similarity analysis for reliability prediction
  • How to determine qualification conditions
  • Define lifetime application (manufacturing, environment and use) conditions based on target market segments
3. Stress Limits and Margins
4. Types of Accelerated Tests
  • Qualitative tests
  • Quantitative tests
5. Qualitative Tests
  • Benefits
  • Unanswered questions
6. Quantitative Accelerated Life Testing
  • “Usage Rate Acceleration” or “Continuous Use Acceleration”
  • The problem with “Continuous Use Acceleration”
  • Accelerating high usage products
  • Different “Accelerated” stress conditions can give different results
  • Qualification for life assessment
7. Life – Stress Relationship
  • Arrhenius relationship
  • Eyring relationship
  • Inverse power law relationship
  • Two parameter relationship
8. Two-Stress Type Testing
9. Case Studies

Past Customers*

  1. DERA - United Kingdom
  2. GM - Michigan
  3. Hobbs Engineering - United States
  4. ITI - India
  5. Lucas - United Kingdom
  6. MoD - United Kingdom
  7. Microsoft - Washington
  8. NokiaSalo - Finland
  9. Saturn - Michigan
  10. Schlumberger - California 
  11. Tubitak - Turkey
*This course has also been presented as a public offering in College Park, MD.*

Related Texts

  1. Electronic Packaging: Design, materials, Process, and Reliability
  2. High Temperature Electronics
  3. Long-Term Non-Operating Reliability of Electronic Products
  4. Product Reliability, Maintainability, and Supportability Handbook
  5. Plastic Encapsulated Microelectronics


Michael Pecht
301-405-5323 | 
Bldg. 89, Room 1103
University of Maryland
College Park, MD 20742