determine and design the best alt

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Determine and Design the Best ALT Fred Schenkelberg, Consultant January 23 rd thru 26 th , 2012 RAMS Session 13C

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Determine and Design the Best ALT. Fred Schenkelberg, Consultant January 23 rd thru 26 th , 2012 RAMS Session 13C. Selection Criteria. Selection Criteria. Meaningful Results. Selection Criteria. Meaningful Results Measures. Meaningful Results: Measures. Threshold. Surrogate. - PowerPoint PPT Presentation

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Page 1: Determine and Design the Best ALT

Determine and Designthe Best ALT

Fred Schenkelberg, ConsultantJanuary 23rd thru 26th, 2012

RAMS Session 13C

Page 2: Determine and Design the Best ALT

Selection Criteria

Page 3: Determine and Design the Best ALT

Selection CriteriaMeaningful Results

Page 4: Determine and Design the Best ALT

Selection CriteriaMeaningful ResultsMeasures

Page 5: Determine and Design the Best ALT

Threshold

Unrelated

Surrogate

Direct

Meaningful Results:Measures

Page 6: Determine and Design the Best ALT

Meaningful ResultsMeasuresCost

Selection Criteria

Page 7: Determine and Design the Best ALT

Threshold

Prohibitive

Budget

Inexpensive

Cost

Page 8: Determine and Design the Best ALT

Meaningful ResultsMeasuresCostPrecisionDurationSamples

Selection Criteria

Page 9: Determine and Design the Best ALT

ALT APPROACHESConsider the alternative ways to conduct the testing

Page 10: Determine and Design the Best ALT

Example CaseCapacitor24/7 operationHigh voltage loadOutdoor environment

Insulation breakdown failure mechanism

Let’s consider some ALT options

Page 11: Determine and Design the Best ALT

Time Compression

Page 12: Determine and Design the Best ALT

Build a Model

Page 13: Determine and Design the Best ALT

Given a Model

Peck’s Relationship

Page 14: Determine and Design the Best ALT

Step Stress

Page 15: Determine and Design the Best ALT

Degradation

Page 16: Determine and Design the Best ALT

Example CaseCapacitor24/7 operationHigh voltage loadOutdoor environment

Insulation breakdown failure mechanism

3 viable ALT options

Page 17: Determine and Design the Best ALT

SelectAssume a Model

ALT Selection

Page 18: Determine and Design the Best ALT

Questions?