Methodology Model Overview. Figure 4 shows the top level view of the methodology. The methodology follows one to one the ab- straction level principle of the EAST-ADL language, starting from the most abstract level, the vehi- cle phase, to the most concrete level, the implementation phase. The methodology shows an idealized forward process oriented view only. It is possible to work with the EAST-ADL model top-down, bottom-up and middle-out; iterations are typically needed in most activities. This is, however, implicit and not encoded in the methodology model. Rather, it can be used during practical application of the methodology and for process instantiation in a concrete project. Figure 4 – Top level of the MAENAD methodology Figure 5 – Analysis phase of the MAENAD methodology Figure 6 – Design phase of the MAENAD methodology Figure 7 – Implementation phase of the MAENAD methodology Standards managing functional safety aspects (e.g. ISO26262) usually are structured in a pro- cess-oriented manner. On the other hand standards which describe FEV specific features often refer to a concrete work product or to a specified vehicle part. Following these strategies the safety aspects given in the tables in chapter 4 (Methodology Analy- sis) and in chapter 8 (Appendix 1: ISO26262 Requirements) are grouped according the develop- ment process. The FEV aspects described in chapter 5 (Design Methodology Checklist for FEVs) are assigned to a specific subject. 4 Methodology Analysis and Refinement for Safety and Electrical Vehicle Design To define the MAENAD EAST-ADL methodology, the ATESST2 methodology was used as a basis. The normative regulation for functional safety in the automotive domain, ISO 26262, has phases with sub-phases comprised by work products, tools and the responsible role. Both process models were compared regarding functional safety to identify needs on methodology content. The follow- ing tables show an excerpt of this analysis. ISO Part Phase Sub-phase Work Products Tools Activity Responsible LINK to Product Development Work Flow (EAST-ADL Based) EAST-ADL artifacts P a r t 2 S a f e t y M a n a g e m e n t Overall safety management Organization-specific rules and processes for functional safety Not applicable Product Liability Manager Vehicle Level Analysis Level Design Level N/A Evidence of competence Not applicable Product Liability Manager Vehicle Level Analysis Level Design Level N/A Evidence of quality management Not applicable Product Liability Manager Vehicle Level Anal...
