What Matters in a Demonstration Test?
Carl and Fred discussing a listener question about how which failures to count in demonstration testing. Specifically, what about maintenance induced failures, supply chain failures and other types of failures, not typically part of the product design.
Join Carl and Fred as they discuss reliability demonstration testing.
- What is purpose of demonstration testing?
- If the product doesn’t work for any reason, it must be addressed.
- Customer doesn’t care why the product doesn’t work: maintenance, supplier, manufacturing.
- What gets counted in a given demonstration test depends on the objective of the test.
- It is possible to separately demonstrate design reliability separate from manufacturing reliability.
- The objective is not merely to pass the test.
- Emphasize testing to failure, where possible.
- Without testing to failure, the assumptions can be challenging.
- Key: all types of failures, maintenance, supplier, manufacturing, etc., must be considered somewhere in product development. Whether it is done separately or combined is less important than the fact that it is done somewhere.
- Replicate manufacturing variation, suppler variation and maintenance issues.
- Don’t explain away failures. Make sure each failure is understood and addressed.
- FMEA can improve test quality.
- Ask why you are doing reliability demonstration tests.
Enjoy an episode of Speaking of Reliability. Where you can join friends as they discuss reliability topics. Join us as we discuss topics ranging from design for reliability techniques to field data analysis approaches.