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Software Reliability Improvement Techniques

In: Reliability and Risk Issues in Large Scale Safety-critical Digital Control Systems

Author

Listed:
  • Han Seong Son

    (Joongbu University)

  • Seo Ryong Koo

    (Doosan Heavy Industries and Construction Co., Ltd.)

Abstract

Digital systems offer various advantages over analog systems. Their use in largescale control systems has greatly expanded in recent years. This raises challenging issues to be resolved. Extremely high-confidence in software reliability is one issue for safety-critical systems, such as NPPs. Some issues related to software reliability are tightly coupled with software faults to evaluate software reliability (Chapter 4). There is not “one right answer” as to how to estimate software reliability. Merely measuring software reliability does not directly make software more reliable, even if there is a “proper answer” for estimation of software reliability. Software faults should be carefully handled to make software more reliable with as many reliability improvement techniques as possible. However, software reliability evaluation may not be useful. Software reliability improvement techniques dealing with the existence and manifestation of faults in software are divided into three categories: - Fault avoidance/prevention that includes design methodologies to make software provably fault-free - Fault removal that aims to remove faults after the development stage is completed. This is done by exhaustive and rigorous testing of the final product - Fault tolerance that assumes a system has unavoidable and undetectable faults and aims to make provisions for the system to operate correctly, even in the presence of faults

Suggested Citation

  • Han Seong Son & Seo Ryong Koo, 2009. "Software Reliability Improvement Techniques," Springer Series in Reliability Engineering, in: Poong Hyun Seong (ed.), Reliability and Risk Issues in Large Scale Safety-critical Digital Control Systems, chapter 5, pages 105-120, Springer.
    • Handle: RePEc:spr:ssrchp:978-1-84800-384-2_5
    DOI: 10.1007/978-1-84800-384-2_5
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