ZUM '98: The Z Formal Specification Notation: 11th International Conference of Z Users, Berlin, Germany, September 24-26, 1998, Proceedings
Jonathan P. Bowen, Andreas Fett, Michael G. Hinchey
Springer Science & Business Media, Sep 16, 1998 - Computers - 424 pages
1 In a number of recent presentations – most notably at FME’96 –oneofthe foremost scientists in the ?eld of formal methods, C.A.R. Hoare,has highlighted the fact that formal methods are not the only technique for producing reliable software. This seems to have caused some controversy,not least amongst formal methods practitioners. How can one of the founding fathers of formal methods seemingly denounce the ?eld of research after over a quarter of a century of support? This is a question that has been posed recently by some formal methods skeptics. However, Prof. Hoare has not abandoned formal methods. He is reiterating, 2 albeitmoreradically,his1987view thatmorethanonetoolandnotationwillbe requiredinthepractical,industrialdevelopmentoflarge-scalecomplexcomputer systems; and not all of these tools and notations will be, or even need be, formal in nature. Formalmethods arenotasolution,butratheroneofaselectionoftechniques that have proven to be useful in the development of reliable complex systems, and to result in hardware and software systems that can be produced on-time and within a budget, while satisfying the stated requirements. After almostthree decades,the time has come to view formalmethods in the context of overall industrial-scale system development, and their relationship to othertechniquesandmethods.Weshouldnolongerconsidertheissueofwhether we are “pro-formal” or “anti-formal”, but rather the degree of formality (if any) that we need to support in system development. This is a goal of ZUM’98, the 11th International Conference of Z Users, held for the ?rst time within continental Europe in the city of Berlin, Germany.
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abstract applet application approach Astate behaviour BINTREE browser C. A. R. Hoare components Computer Science concrete concurrent constraints defined definition derived describe diagrams displet documents editors elements environment Event Calculus example extended finalisation finite state machine formal methods formal specification free type function global heterogeneous HOL-Z hybrid systems IEEE implementation input integration interface J. C. P. Woodcock J. P. Bowen Lecture Notes lift logic M. G. Hinchey mathematical Nicholls notation Notes in Computer object object-oriented Object-Z operation output parameters phase precondition predicative Proc process algebra proof obligations real-time recursive refinement rules retrieve relation schema schema expressions Section semantics sendto seq G sequence Software Engineering Spivey Springer-Verlag standard structure syntactic syntax task TCOZ theorem theory tion transition variables Woodcock Workshop Z notation ZimOO