• 1 Status
• 2 Top Event
• 3 Minimal Cut Set
• 4 Description
• 5 Severity
• 6 Likelihood
• 7 Mitigation
• 8 Residual Severity
• 9 Residual Likelihood
• 10 Affected Documents
• 11 Monitoring

FTA-004: Unit Conversion Fault in Reports ¶

1 Status ¶

2 Top Event ¶

Misleading report delivered to the user (TOP-2)

3 Minimal Cut Set ¶

{E7} — unit conversion fault; a first-order cut set, one basic event suffices

4 Description ¶

A value stored in one measurement unit is rendered in a report column labelled with another. As a first-order cut set under an OR gate, this single fault delivers the top event on its own, which is what drives the likelihood score.

5 Severity ¶

7

6 Likelihood ¶

5

7 Mitigation ¶

Carry the measurement unit with the value from the data model into every report column, so a unit can never be reattached by the presentation layer.

8 Residual Severity ¶

7

9 Residual Likelihood ¶

2

10 Affected Documents ¶

11 Monitoring ¶

Report rendering tests compare the unit of every column against the data model on each release.