FMEA Fault Models

FMEA Fault Models		status: valid
tags: safety_analysis, safety_analysis contained by: wf__analyse_featarch, wf__analyse_comparch, wf__mr_saf_analyses_dfa, wf__vy_saf_analyses_dfa complies: std_req__iso26262__software_7410, std_req__iso26262__analysis_846
Fault Model for sequence diagrams
gd_guidl__fault_models		Process Guideline

Note

Use the applicable fault models to ensure a structured analysis. If there are additional fault models needed, please enlarge the list of fault models.

Note

An ASIL related message is trustable in that manner that it is not corrupted, repeated, lost, delayed, masqueraded or addressed incorrectly.

Fault Models for sequence diagrams

Element	ID	Failure Mode	Importance
duration/time constraint	fmea_fault_model__co_01_01	minimum constraint boundary is violated	Medium
duration/time constraint	fmea_fault_model__co_01_02	maximum constraint boundary is violated	High
execution	fmea_fault_model__ex_01_01	process calculates wrong results, Is a subset/more precise description of fmea_fault_model__mf_01_05 or fmea_fault_model__mf_01_04. This failure mode is relevant to the analysis if e.g. internal safety mechanisms are required (level 2 function, plausibility check of the output, …) because of the size/complexity of the feature.	High
execution	fmea_fault_model__ex_01_02	processing too slow,Only relevant if timing is considered	Medium
execution	fmea_fault_model__ex_01_03	processing too fast,Only relevant if timing is considered	Medium
execution	fmea_fault_model__ex_01_04	loss of execution	High
execution	fmea_fault_model__ex_01_05	processing changes to arbitrary process	Medium
execution	fmea_fault_model__ex_01_06	processing is not complete	High
message	fmea_fault_model__mf_01_01	message is not received,Is a subset/more precise description of fmea_fault_model__mf_01_05.	High
message	fmea_fault_model__mf_01_02	message received too late ,Only relevant if delay is a realistic fault	Medium
message	fmea_fault_model__mf_01_03	message received too early,Usually not a problem	Low
message	fmea_fault_model__mf_01_04	message not received correctly by all recipients,Different messages or messages partly lost. Only relevant if the same message goes to multiple recipients.	High
message	fmea_fault_model__mf_01_05	message is corrupted	High
message	fmea_fault_model__mf_01_06	message is not sent	High
message	fmea_fault_model__mf_01_07	message is unintended sent	High