Software Requirement Specification Essay Example for Free

Software Requirement Specification EssayStudents to some(prenominal) service modeling techniques for representing business transites. Although this chapter focuses primarily on selective information flow diagram, brief overviews of functional hierarchy modeling and Oracles process modeler are given. After a brief invention to process modeling, data flow diagramming techniques are introduced in a section called information scat Diagramming Mechanics. This section demonstrates the basic DFD symbols, definitions, and rules.The authors use the Gane and Sarson symbol set throughout the book, and these symbols are explained in this section. Hoosier Burger, the nutriment ordering system first mentioned in Chapter 2, is used to adorn basic data flow diagramming concepts. This section also includes explanations of decomposition and balancing. Chapter 8s third major section introduces four diverse types of DFDs current physical, current logical, new logical, and new physical. Hoosier Burgers inventory control system (which is manual) is used to bedeck the first three types of DFDs.Current practice in using DFDs indicates that very little time should be spent on the current physical DFD. The fourth major section in this chapter, Using Data Flow Diagramming in the Analysis Process, introduces guidelines for drawing and using DFDs. This is different from the mechanical rules presented earlier. Topics include completeness, consistency, timing, repetitious development, primitive DFDs, and analyzing DFDs for system inefficiencies and discrepancies among DFDs that are supposed to be modeling the same system. A Hoosier Burger example helps illustrate these guidelines.The Oracles Process Modeler and Functional Hierarchy Diagrams section introduces students to two other process modeling tools. These tools are Oracle Designers process modeler and functional hierarchy modeling, a tool found in several CASE products. In this section, the authors show how to prepar e basic process models and functional hierarchy diagrams. Additionally, the authors compare and contrast Oracles process models to data flow diagramming. In the last section of this chapter, the authors overview process modeling for Internet-based electronic commerce applications.As they explain, process modeling for Internet-based electronic commerce applications does not differ from more traditional applications development projects. Instructional Objectives Specific student erudition objectives are included at the beginning of the chapter. From an instructors point of view, the objectives of this chapter are to 1. Show how to logically model processes with data flow diagrams. 2. Teach students data flow diagram symbols and the mechanical rules necessary to raise accurate, well-structured process models. 3. Show students how to decompose data flow diagrams into lower-level diagrams.For people who are not familiar with data flow diagrams, the students should find that it is relat ively easy to show them that data flow diagrams are a burst way to model processes. Chances are that this persons original picture already has many of the elements of a standard data flow diagram anyway. Research has found that process modeling is a very natural activity for most people, even when they are not formally trained in this technique.