Accession Number : ADA610905


Title :   Reliability Validation and Improvement Framework


Descriptive Note : Special rept.


Corporate Author : CARNEGIE-MELLON UNIV PITTSBURGH PA SOFTWARE ENGINEERING INST


Personal Author(s) : Feiler, Peter H ; Goodenough, John B ; Gurfinkel, Arie ; Weinstock, Charles B ; Wrage, Lutz


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a610905.pdf


Report Date : Nov 2012


Pagination or Media Count : 117


Abstract : Software-reliant systems such as rotorcraft and other aircraft have experienced exponential growth in software size and complexity. The current software engineering practice of build then test has made them unaffordable to build and qualify. This report discusses the challenges of qualifying such systems, presenting the findings of several government and industry studies. It identifies several root cause areas and proposes a framework for reliability validation and improvement that integrates several recommended technology solutions: validation of formalized requirements; an architecture-centric, model-based engineering approach that uncovers system-level problems early through analysis; use of static analysis for validating system behavior and other system properties; and managed confidence in qualification through system assurance. This framework also provides the basis for a set of metrics for cost-effective reliability improvement that overcome the challenges of existing software complexity, reliability, and cost metrics.


Descriptors :   *SOFTWARE ENGINEERING , AIRCRAFT , AVIONICS , COMPUTER PROGRAM VERIFICATION , METRICS , RELIABILITY


Subject Categories : Computer Programming and Software


Distribution Statement : APPROVED FOR PUBLIC RELEASE