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DOO -HOBK-344{USAF) CONTENTS 1. Scope 1.1 Purpose 1.2 Application. 1.3 General, PAGE 1.3.1 What is ESS? 1.3.2 Organization of the Handbook 2 1.3.3 Development and production phase reliability assurance 4 1.3.4 ESS application and the quantitative approach 4 1.3.4.1 The quantitative approach 5 1.3.5 Benefits of the quantitative approach 7 1.3.6 Process capability and defect density 7 2. Referenced documents 8 2.1 Government documents . 8 2.2 Nongovernment documents 8 2.2.1 Other nongovernment documents 9 3. Definitions and acronyms 10 3.1 Definitions 10 3.2 Acronyms/Abbreviations 12 3.2.1 Acronyms used in procedure A of section 5 12 3.2.2 Other acronyms 12 4. General guidelines 13 4.1 Relation of ESS to MIL-STD-785 reliability program tasks 13 4.2 Contractual aspects of ESS 13 4.3 Subcontractor and supplier stress screening 14 4.3.1 Screening of spares 14 4.4 Costs of ESS vs productivity improvement 15 4.5 Air Force R8M 2000 ESS policy - part fraction defective 15 4.6 Part vs assembly fraction defective 16 4.7 Part level screening/rescreening 17 4.8 Development phase screening.. 19 4.9 ESS experimentation - Pre-production prototypes 20 4.10 Planning a stress screening program for the production phase 20 4.10.1 Establishing objectives/goals 22 4.10.2 Obtaining planning estimates defect density 23 4.10.2.1 Latent vs patent defects 23 4.10.2.2 Categories of defects 25 4.10.2.3 Factors which impact defect density 26 4.10.2.3.1 Part fraction defective and MIL-STD quality levels 27 4.10.2.3.2 Screenable latent defects and the field stress environment 27 4.10.2.3.3 Process maturity and defects 29 4.10.2.3.4 Packaging density 29 4.10.3 Screen selection and placements 30 4.10.3.1 Goals on remaining defect density 30 4.10.3.2 Incoming defect density.... 31 4.10.3.3 Screen effectiveness 31 4.10.3.3.1 Pre/post screen testing and screen effectiveness 33 4.10.3.3.2 Pre and post screen testing during production... 33 4.10.3.3.3 Screen parameters 34 4.10.3.4 Test detection efficiency 36 4.10.3.4.1 Determining test detection efficiency 36 4.10.3.4.2 Power on testing vs power off 39 4.10.3.5 Thermal and vibration response characteristics 40 4.10.3.6 Design limits 40 4.10.3.7 Facilities and costs 40 4.10.3.8 Failure-free acceptance screen/test 41 4.10.4 Preparation of ESS plans. 41 Source: http://www.assistdocs.com -- Downloaded: 2013-02-28T12:40Z Check the source to verify that this is the current version before use.

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