ISO 26262-10:2012(E)
© ISO 2012 – All rights reserved iii
Contents Page
Foreword ............................................................................................................................................................iv
Introduction.........................................................................................................................................................v
1 Scope ......................................................................................................................................................1
2 Normative references............................................................................................................................1
3 Terms, definitions and abbreviated terms ..........................................................................................2
4 Key concepts of ISO 26262...................................................................................................................2
4.1 Functional safety for automotive systems (relationship with IEC 61508) .......................................2
4.2 Item, system, element, component, hardware part and software unit.............................................4
4.3 Relationship between faults, errors and failures ...............................................................................5
5 Selected topics regarding safety management..................................................................................6
5.1 Work product .........................................................................................................................................6
5.2 Confirmation measures ........................................................................................................................6
5.3 Understanding of safety cases ............................................................................................................9
6 Concept phase and system development.........................................................................................10
6.1 General .................................................................................................................................................10
6.2 Example of hazard analysis and risk assessment...........................................................................10
6.3 An observation regarding controllability classification ..................................................................11
6.4 External measures...............................................................................................................................12
6.5 Example of combining safety goals ..................................................................................................13
7 Safety process requirement structure - Flow and sequence of safety requirements ..................14
8 Concerning hardware development ..................................................................................................17
8.1 The classification of random hardware faults ..................................................................................17
8.2 Example of residual failure rate and local single-point fault metric evaluation ...........................22
8.3 Further explanation concerning hardware .......................................................................................34
9 Safety element out of context ............................................................................................................36
9.1 Safety element out of context development .....................................................................................36
9.2 Use cases .............................................................................................................................................37
10 An example of proven in use argument ............................................................................................45
10.1 General .................................................................................................................................................45
10.2 Item definition and definition of the proven in use candidate ........................................................46
10.3 Change analysis ..................................................................................................................................46
10.4 Target values for proven in use .........................................................................................................46
11 Concerning ASIL decomposition.......................................................................................................47
11.1 Objective of ASIL decomposition ......................................................................................................47
11.2 Description of ASIL decomposition ..................................................................................................47
11.3 An example of ASIL decomposition ..................................................................................................47
Annex A (informative) ISO 26262 and microcontrollers ..............................................................................51
Annex B (informative) Fault tree construction and applications ................................................................73
Bibliography......................................................................................................................................................89
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