determine and design the best alt
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Determine and Designthe Best ALT
Fred Schenkelberg, ConsultantJanuary 23rd thru 26th, 2012
RAMS Session 13C
Selection Criteria
Selection CriteriaMeaningful Results
Selection CriteriaMeaningful ResultsMeasures
Threshold
Unrelated
Surrogate
Direct
Meaningful Results:Measures
Meaningful ResultsMeasuresCost
Selection Criteria
Threshold
Prohibitive
Budget
Inexpensive
Cost
Meaningful ResultsMeasuresCostPrecisionDurationSamples
Selection Criteria
ALT APPROACHESConsider the alternative ways to conduct the testing
Example CaseCapacitor24/7 operationHigh voltage loadOutdoor environment
Insulation breakdown failure mechanism
Let’s consider some ALT options
Time Compression
Build a Model
Given a Model
Peck’s Relationship
Step Stress
Degradation
Example CaseCapacitor24/7 operationHigh voltage loadOutdoor environment
Insulation breakdown failure mechanism
3 viable ALT options
SelectAssume a Model
ALT Selection
Questions?
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