The Formal Design Model of an Automatic Teller Machine ATM

  • Authors:

  • Yingxu Wang;Yanan Zhang;Philip C.Y. Sheu;Xuhui Li;Hong Guo

  • Affiliations:

  • University of Calgary, Canada;University of Calgary, Canada;Wuhan University, China and University of California - Irvine, USA;Wuhan University, China;Coventry University, UK

  • Venue:
  • International Journal of Software Science and Computational Intelligence
  • Year:
  • 2010

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Abstract

An Automated Teller Machine ATM is a safety-critical and real-time system that is highly complicated in design and implementation. This article presents the formal design, specification, and modeling of the ATM system using a denotational mathematics known as Real-Time Process Algebra RTPA. The conceptual model of the ATM system is introduced as the initial requirements for the system. The architectural model of the ATM system is created using RTPA architectural modeling methodologies and refined by a set of Unified Data Models UDMs, which share a generic mathematical model of tuples. The static behaviors of the ATM system are specified and refined by a set of Unified Process Models UPMs for the ATM transition processing and system supporting processes. The dynamic behaviors of the ATM system are specified and refined by process priority allocation, process deployment, and process dispatch models. Based on the formal design models of the ATM system, code can be automatically generated using the RTPA Code Generator RTPA-CG, or be seamlessly transformed into programs by programmers. The formal models of ATM may not only serve as a formal design paradigm of real-time software systems, but also a test bench for the expressive power and modeling capability of exiting formal methods in software engineering.