NDLI: Toward dependable safety-critical software

Content Provider	IEEE Xplore Digital Library
Author	Bastani, F. Cukic, B. Hilford, V. Jamoussi, A.
Copyright Year	1996
Description	Author affiliation: Dept. of Comput. Sci., Houston Univ., TX, USA (Bastani, F.; Cukic, B.; Hilford, V.; Jamoussi, A.)
Abstract	The failure of safety critical systems can result in catastrophic loss of life and property. Hence, it is necessary to assure the reliability of these systems to a high degree of confidence before they are put into operational use. However, at these extreme levels of ultra high reliability requirements, errors in the specification and in estimates of the operational profile become significant factors. An approach that has been suggested is to use secondary and tertiary software that meet ultra high reliability requirements but at a reduced functionality as compared with the primary software. Two major problems are: how to select appropriate functionality for the non primary versions; and how to determine when to invoke these backup versions. We present a unified approach for handling these two problems. It starts with a rigorous method for assessing ultra high reliability requirements and then develops mechanisms for incorporating one of more backup versions. The reliability assessment procedure uses formal methods to amplify the effect of each test case and results in the construction of a reliability MAP (Measured Assurance Prediction system) for the software. This provides a confidence estimate for the correctness of the software for a given operational situation and serves as a trigger for switching to a backup version. The main requirement is that the MAP for the backup version must be known to a higher degree of confidence than that for the original version. The approach is illustrated using a simple process control example.
Starting Page	86
Ending Page	92
File Size	788837
Page Count	7
File Format	PDF
ISBN	0818675705
DOI	10.1109/WORDS.1996.506265
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-02-01
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Software safety Computer aided manufacturing Hardware Computer science System testing Embedded computing Weight control Control systems Aerospace control Chemicals
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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