Environmental and Reliability Testing

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What you will learn: 

This course covers the environmental and reliability tests performed during design and in manufacturing. You will learn about reliability prediction techniques and factors. You will learn what you can expect from reliability growth testing environmental stress screening (ESS). You will know how environmental stress screening (ESS) is used to flush out flaws introduced during processing, fabrication and assembly. When highly accelerated for longer duration, this is called Reliability Test. You will learn how Reliability Test can flush out design flaws resulting from incompatible interfaces, from erroneous functional performance in different environments and from weak components. By the completion of this course you will be able to formulate environmental and reliability test strategies for your own products.

Who should Attend: 

This course is for test and reliability engineers interested in uncovering both design and manufacturing flaws through environmental stresses.

COURSE OUTLINE:

Principles of Environmental Testing

• Controlling Infant Mortality Failures
• Identifying Root Causes in Manufacturing

Principles of Reliability Testing

• Testing for Durability
• Identifying Design Flaws
• Identifying Weak Components

Designing Tests

• Process Failure Mode Effects Analysis (FMEA) inputs
• Design FMEA inputs
• Fault Tree Analysis Inputs

Reliability Growth Testing

• Duane Model, AMSAA Model
• Accelerated Stresses
• ATAF vs. TAAF Strategy

Environmental Stress Screening (ESS) Techniques

• Highly Accelerated Stress Screening
• Highly Accelerated Stress Audit
• Proof of Production Screen

Statistical Analysis

• Probability Failure Distribution
• Weibull Graphical Method
• Weibayes Technique

Fundamentals in Life Testing

• Accelerated Test Principles
• Life Estimation
• Design Life Failure Rates
• Estimating Safety Margins
• Predictions of Spares

Test Models

• Arrhenius Model
• Inverse Power Law
• Limit Testing

Introduction

• ESS Myths & Facts

ESS Techniques

• Highly Accelerated Life Test
• Highly Accelerated Stress Screen
• Highly Accelerated Stress Audit
• Proof of Production Screen

Latent Defects

• High Rate Thermal Cycling
• Broad Band Vibration Stresses

Design for Test Detection

Implementing ESS

ESS Workshop

Costing ESS

• ESS Fixturing
• Equipment Considerations

Selling Management on ESS

• Technical Rewards
• Quality & Reliability Rewards
• Financial & Marketing Rewards

Reliability Demonstration

• Fixed Length Testing
• Fixed Failure Testing
• Minimum Life Predictions

Technology Trends

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