2.5.10 Demonstration
Origin's Demonstration Test Plan is used to design a validation experiment to demonstrate that a product satisfies a quantitative reliability requirement at a specified level of confidence. That is, it answers the planning question:
- "Before I test, how many units do I need, how long must I run each unit, and how many failures can I allow, so that passing the experiment lets me claim with 95% confidence that the product meets its reliability target?"
The tool creates a "test plan" by taking a sample size, a test duration per unit, a life distribution and an acceptance number. You can run the test, count the failures, and declare the "reliability claim" if the obaserved failures are not large than the setup rule.
Use a Demonstration Test Plan when:
- A contract, regulation, or internal specification requires a "formal proof" that a reliability target is satisfied.
- You are validating a "redesign" and must show that the new design is at least as reliable as a historical baseline.
- You need to decide "resource allocation" - sample size and test time - before testing begins.
- You want a simple pass/fail rule rather than a full distributional analysis.
- Test units are expensive or scarce, so you must justify the minimum amount of testing that still yields a defensible claim.
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