Computers are key elements of many systems, including utilities and transportation. Such systems are reliant on software to ensure safety, i.e. to protect human life and health. It is important for designers both to achieve safety and to demonstrate that they have done so. This chapter addresses both issues, including ways of demonstrating safety using safety cases. Software also has a role in system availability, reliability, and cyber security. We use the term dependability for this broader set of system attributes; the chapter also considers how to address these attributes, and trade-offs between them, using dependability cases Finally, the chapter considers some of the emerging challenges of achieving and demonstrating the safety of systems of systems, and of autonomous systems.
IOS Press, Inc.
6751 Tepper Drive
Clifton, VA 20124
Tel.: +1 703 830 6300
Fax: +1 703 830 2300 firstname.lastname@example.org
(Corporate matters and books only) IOS Press c/o Accucoms US, Inc.
For North America Sales and Customer Service
West Point Commons
Lansdale PA 19446
Tel.: +1 866 855 8967
Fax: +1 215 660 5042 email@example.com