| FMECA | Failure Mode Effect and Criticality Analysis (FMECA) as defined by MIL-STD-1629A, TM 5-698-4, and related standards is now available in the FMEA. The new quantitative FMECA option supports the calculation of failure mode criticality and component criticality numbers directly in an FMEA worksheet. Operating times and mission phases can be specified for complex scenarios where not all components are exposed to the same operational profile.  |
| Configurable Failure Rate Units | Until this release medini used to show all failure rates in FIT ("Failure in Time"). With 2020 R1 the unit can be configured per project to be one of failures per hour (FpH), failure per 106hours (FmpH), or failure per 109hours (FIT). The tool UI that shows and edits failure rates will change consistently to this setting. A note to our expert users: the internal data format has not changed and continues to use FIT, so no need to update or retrofit your constraints or scripts. |
| NOT Gate in FTA | The types of supported fault tree gates has been extended to include the NOT gate. Although rarely used from a safety perspective, the NOT might be useful to model certain reliability scenarios with FTA. Note that the quantitative calculations will be limited to unavailability (for repairable models) as it was the case with the XOR gate before, because both turn a fault tree into a non-coherent one. |