In order to generate an adequate MMEL you need to perform Reliability/FMECA and Safety analyses prior to initiating the MMEL Module.
Performance of MMEL quantitative analysis utilizes the following information which is the results of Reliability/FMECA and Safety analyses:
| 1. | Product tree Items data: |
| c) | Item operating Failure Rate |
| 3. | FMECA – Failure Mode End Effect Criticality Analysis |
| 4. | FTA – Fault Tree Analysis |
| 5. | Failure modes defined in the FMECA must be used as Basic Events in FTA. |
| 6. | Each Basic Event must be connected to a corresponding Failure Mode through Product Tree ID and Failure Mode Number. |
| 7. | Each Fault Tree in FTA must be connected to a corresponding Failure Condition in FHA. This connection is established done at the Safety Assessment Definition screen. |
The picture below illustrates linkage between Product tree, FMECA, FTA and Safety (FHA) modules which is used by MMEL module:
