Software Specification Methods: An Overview Using a Case Study
Objectives of this Book This book is an introduction to a set of software specification methods. Its tar geted audience are readers who do not wish to read pages of definitions in order to understand the basics of a method. The same case study is used to introduce each method, following a rigorously uniform presentation format. Special care has been devoted to ensure that specifications do not deviate from the case study text. As much as the method allows, what is specified is what appears in the case study text. The benefits are two-fold. First, the reader can easily switch from one method to another, using his knowledge of the case study as a leverage to understand a new method. Second, it becomes easier to compare methods, because the same behavior is specified in each case. Each method presentation follows the same pattern. The concepts are pro gressively introduced when they are needed. To illustrate the specification pro cess, questions that the specifier should raise during the analysis of the case study are stated. Answers are provided as if they were given by an imaginary client. The question/answer process guides the derivation of the specification. Interestingly, the questions raised depend on the method, which is illustrative of the differences between them.
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abstract action system Actor Analysis and Specification Answer associated assume attribute behaviour cancel an order cancel order class diagram Collaboration diagram components Computer constraints corresponding data types defined deletion domain entity entry event formal methods formal specification function definition given Hardware Description Language implementation initialisation input instance interaction invoice an order Invoice Order language LOTOS machine method natural numbers newids neword notation object object diagram operation invoice order cancellation ORDER ID order identifier order number orderCustomerFel ordered product ordered quantity orderProduct Rel orders and stock orderStatus output parameters pending orders Petri nets possible postconditions precondition predicate PRODUCT_ID provides quantity in stock Question 9 resp scenarios semantics sequence sequence diagram set of orders signal SSADM State_of_stock state/transition diagrams status stock level structure tion transition Université de Sherbrooke update user requirements valid variable VHDL