Accession Number : ADA327598

Title :   Completeness and Consistency in Hierarchical State-Based Requirements,

Corporate Author : MICHIGAN STATE UNIV EAST LANSING DEPT OF COMPUTER SCIENCE

Personal Author(s) : Heimdahl, Mats. P. ; Leveson, Nancy G.

PDF Url : ADA327598

Report Date : 1995

Pagination or Media Count : 34

Abstract : This paper describes methods for automatically analyzing formal, state-based requirements specifications for some aspects of completeness and consistency. The approach uses a low-level functional formalism, simplifying the analysis process. State-space explosion problems are eliminated by applying the analysis at a high level of abstraction; i.e., instead of generating a reachability graph for analysis, the analysis is performed directly on the model. The method scales up to large systems by decomposing the specification into smaller, analyzable parts and then using functional composition rules to ensure that verified properties hold for the entire specification. The analysis algorithms and tools have been validated on TCAS II, a complex, airborne, collision-avoidance system required on all commercial aircraft with more than 30 passengers that fly in U.S. airspace.

Descriptors :   *SOFTWARE ENGINEERING, ALGORITHMS, SPECIFICATIONS, PROGRAMMING LANGUAGES, SEMANTICS, SYSTEMS ANALYSIS, COMPUTER PROGRAM VERIFICATION, DESIGN CRITERIA, SYNTAX.

Subject Categories : Computer Programming and Software

Distribution Statement : APPROVED FOR PUBLIC RELEASE