Statistical Design of Experiments
Statistical Design of Experiments
Why Robust Design?
Why Robust Design?
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Warranty Costs
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Costs exceed target goals
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Products sometimes fail to perform
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Variation in product
function
is also a major
contributor (lack of robustness)
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any variation from the performance target
is bad for the customer
•
•
Warranty Costs...
Warranty Costs...
•
•
Product Cycle Time...
Product Cycle Time...
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Need to reduce “design/development time”
Need to reduce “design/development time”
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–
Need to improve new product reliability...
Need to improve new product reliability...
it’s never where it should be at ‘launch.’
it’s never where it should be at ‘launch.’
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–
Design ‘refining’ is avoided when the
Design ‘refining’ is avoided when the
robustness
robustness
(sensitivity to variation) is
(sensitivity to variation) is
evaluated and known early
evaluated and known early
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