| Entrance | What is it used for? |
| Calculation | Designing a reliability demonstration test without data. |
| Stress-Strain | Estimate a failure rate by comparing the stress applied to the product with its strength. |
| Reliability Estimate | Fit a lifespan model based on returns or tests. This is the main input. |
| Return Tracking | Compare actual returns with the expected returns from a reliability model. |
| Return Tracking Cards | Present this monitoring data in the form of control charts to detect any deterioration. |
| Accelerated Testing | Extrapolate the service life under normal conditions from tests conducted under increased stress. |
💡 The usual order of use: Calculation Before beginning the tests, Estimate or Accelerated Testing to enact the law, and then Return Tracking to verify in actual operation that the real-world results match the model.