ASILs for the preliminary elements are the result of the ASIL allocation and decomposition, whereby ASILs for elements that already exist in the field can occur.
If different ASILs or ASILs and non-ASILs are allocated to one element, an analysis of the coexistence of elements is performed.
Algorithm for the Automated Assignment of Component ASILS
In the rest of this article, Section 2 describes our definitions of MSILs that will be introduced in the next revision of ISO 26262, as well as the corresponding relationships between MSILs and ASILs. Section 3 describes a basic concept for investigating the validity of the corresponding relationships between MSILs and ASILs.
It is not appropriate to directly apply current ASILs to motorcycles.
We demonstrated that, by considering motorcycle-specific situations, it is appropriate to increase the degree of tolerable risk for motorcycles compared with the case of motor vehicles (see graph at the upper right side of Figure 2), and that it is appropriate to reduce the maximum severity for motorcycles compared with motor vehicles (see graph at the upper left side of Figure 2), on the CDRA shown in Figure 1 in order to explain the concept of ASILs. This allows the intolerable risk area in the CDRA to be considerably reduced compared with that for motor vehicles.
Since there is no parallel, redundant method for sensing brake position, the IC typically has to meet the requirements of ASIL B.
The IS026262 ASIL B level requires a failure rate of < 100 FIT and a single-point fault metric of 90 percent.
These features, together with many others implemented during the development of the device, have resulted in a successful IC which boasts a single-point fault metric of 90 percent and which is, thus, qualified for ASIL B.
"By making significant investments in DesignWare IP solutions that are ASIL Ready certified, Synopsys enables designers to accelerate their development schedules and time to automotive certification for their SoCs."
The ASIL Ready certified DesignWare IP portfolio for automotive SoCs is available now:
ASIL D Ready: MTP EEPROM and FTP Trim NVM, ARC EM processors with Safety Enhancement Package, ARC EM Safety Islands, Embedded Memories, STAR Hierarchical System and STAR Memory System