An illustration of the Yourdon method with Ward/Mellor and Hatley/Pirbhai real time extensions and a review of workstation hosted CASE tools that support the methodology

Describes work carried out for Thorn Security Ltd to illustrate the application of Ward/Mellor structured analysis methods to the analysis of fire monitoring systems. Typical target systems are embedded using a real time, multi-tasking kernel to schedule processes. An extension to the method appropriate for the design of such systems proposed by two CASE tool suppliers, Ready Systems and Westmount, is described. Certain features proposed by Hatley and Pirbhai are included together with a description of the differences between the methods in the specification of control transformations