• 1 Status
• 2 Failure Mode
• 3 Effect
• 4 Cause
• 5 Severity
• 6 Occurrence
• 7 Detection
• 8 Mitigation
• 9 Monitoring

FMEA-002: UI Freeze Under Load ¶

1 Status ¶

2 Failure Mode ¶

The user interface stops responding for tens of seconds when a large data set is opened.

3 Effect ¶

The user assumes a crash and force-quits the application, losing unsaved work and trust in the product.

4 Cause ¶

The data set is parsed on the interface thread; nothing yields control or reports progress while the parse runs.

5 Severity ¶

5

6 Occurrence ¶

5

7 Detection ¶

3

8 Mitigation ¶

Move the parse off the interface thread and show a cancellable progress indicator; analysis of the change is still in progress, so no residual scores are claimed yet.

9 Monitoring ¶

Interface responsiveness is measured in the nightly performance run against the large reference data set.