Reliability can be an important issue at throughout the product life cycle. There is no single products life cycle suitable for all products but reliability activities in a typical life cycle are shown in following table:
| Life cycle stage | Reliability activity |
|---|---|
| Contract discussions | Correct identification and definition of relevant reliability targets. |
| Outline design | Simple reliability calculations to ensure that design concept is feasible. |
| Detailed design | Full reliability model of proposed system, including realistic maintenance assumptions. Frequently making use of a reliability simulation. |
| Manufacture and installation | None. |
| Testing / handover | Review of proposed test plan and results to ensure that RBD/Fault Trees reflect system capability. Reliability demonstration that product specifications have been met. |
| Use | Development of a maintenance plan to ensure that the maintenance assumptions are met. |
| Repair | Collection and analysis of data from failed components to check and refine failure models. |
| Disposal | None. |
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