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MIL-HDBK-344A CONTENTS PAGE 1. INTRODUCTION 1"1 1.2 Application 1"1 1.3 General 1"1 1.3.1 What is ESS 1"1 1.3.2 Organization of the Handbook 1 1.3.3 Development and Production Phase Reliability Assurance 1-4 1.3.4 ESS Application and the Quantitative Approach 1-4 1.3.4.1 The Quantitative Approach 1-4 1.3.5 Benefits of a Quantitative Approach 1-6 1.3.6 Process Capability and Defect Density 1-6 2. REFERENCED DOCUMENTS 2-1 2.1 Government Documents 2-1 2.2 Non Government Documents 2-2 2.2.1 Other Non Government Documents 2-2 3. DEFINITIONS AND ACRONYMS 3"1 3.1 Definitions 3-1 3.2 Acronyms/Abbreviations 3-3 3.2.1 Acronyms Used In Procedure B Of Section 5 3-3 3.2.2 Other Acronyms 3-3 4. GENERAL GUIDELINES 4'1 4.1 Contractual Aspects of ESS 4-1 4.2 Relation of ESS to MIL-STD-785 Reliability Program Tasks 4-1 4.3 Subcontractor and Supplier Stress Screening 4-1 4.3.1 Screening of Spares 4-2 4.4 Planning a Stress Screening Program 4-2 4.4.1 Preparation of ESS Plans 4-3 4.4.1.1 Development Phase Plan 4-3 4.4.1.2 Production Phase Plan 4-4 4.4.2 Establishing Objectives/Goals 4-4 4.4.3 Obtaining Planning Estimates of Defect Density 4-5 4.4.3.1 Latent vs. Patent Defects 4-5 4.4.3.2 Categories of Defects 4-6 4.4.3.2.1 Screenable Latent Defects and the Field Stress Environment 4-6 4.4.3.3 Factors Which Impact Defect Density 4-7 4.4.3.3.1 Part vs. Assembly Defect Density 4-8 4.4.3.3.2 Part Level vs. Assembly Level Screening 4-8 4.4.3.3.3 Air Force R&M 2000 ESS Policy-Part Fraction Defective 4-9 4.4.3.3.4 Process Maturity and Defects 4-9 4.4.3.3.5 Packaging Density 4-10 4.4.4 Screen Selection and Placement 4-10 4.4.4.1 Precipitation Efficiency 4-11 4.4.4.1.1 Screen Parameters 4-12 4.4.4.1.2 Design Limits 4-13 4.4.4.1.3 Guidelines for Initial Screen Selection and Placement 4-13 4.4.4.1.4 R&M 2000 ESS Initial Regimen 4-14 v i Source: http://www.assistdocs.com -- Downloaded: 2013-02-25T13:57Z Check the source to verify that this is the current version before use.

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