Test Strategy
Reliability Test Planning
Define what to test, at which stresses, for how long and with how many samples.
Purpose & Benefit
When This Activity Helps
Use before committing samples and laboratory time, or to review an existing programme. A justified plan reduces avoidable test expenditure and produces evidence that answers the project requirement.
Project Information
Typical Inputs
The scope is tailored to the available evidence. Useful inputs include:
- Reliability target, confidence and failure criteria
- Mission profile and dominant mechanisms
- Sample availability, schedule and laboratory constraints
Engineering Approach
How SPACEREL Supports Your Project
SPACEREL defines the test objective, stress conditions, sample size, duration, monitoring and analysis method. Sequencing and pre-test and post-test measurements are considered. Specialist laboratory execution can be coordinated where required.
Documented Outcomes
Typical Deliverables
Deliverables are agreed before work starts and can include:
- Reliability test plan and rationale
- Sample size, duration and monitoring requirements
- Acceptance criteria and analysis plan
Reliability Toolkit
Related Calculators
Explore demonstration sample size, test duration and thermal acceleration while developing the evidence plan.
RDT Sample Size & Test Time
Calculate reliability demonstration test sample size or test time from reliability, confidence, allowable failures and optional Weibull assumptions.
Open CalculatorArrhenius Acceleration Factor
Calculate Arrhenius thermal acceleration factor and equivalent use time from activation energy, use temperature and stress temperature.
Open CalculatorWeibull Reliability & B-Life
Calculate Weibull reliability at time and B-life percentile from beta and characteristic life eta.
Open CalculatorMethods & Evidence
Selected References
- NIST/SEMATECH: Assessing Product Reliability
Reliability distributions, life-data analysis and test-planning guidance.
Project Context
Where This Activity Can Help
Explore the relevant lifecycle stages.