15.11.2012 Views

Integrated and Modular Systems for Commercial ... - Nonstop Systems

Integrated and Modular Systems for Commercial ... - Nonstop Systems

Integrated and Modular Systems for Commercial ... - Nonstop Systems

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

34<br />

Resource Partitioning (cont’d)<br />

• Partitions cannot be trusted:<br />

� an independent protection mechanism must be provided<br />

against breaches of partitioning<br />

� all failures of the protection mechanism must be detectable<br />

• Advantages of partitioning:<br />

� provides an effective means to meet safety req’s<br />

� maximizes ability to detect & contain errors/faults<br />

� allows partitions to be updated & certified separately<br />

� allows re-V&V to be limited to changed partition<br />

� allows incremental & parallel design, test, integration<br />

� supports cost-effective development, cert., maint., updates<br />

� allows mixed-criticality (not within same partition!)<br />

� provides flexibility in responding to evolving system req’s<br />

ref.: M.J. Morgan: “<strong>Integrated</strong> modular avionics <strong>for</strong> next-generation commercial airplanes”, IEEE AES Magazine, Vol. 6, No. 9, Aug. ‘91, pp. 9-12<br />

©1997 F.M.G. Dörenberg

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!