Systems Analysis Design Sixth Edition Toolkit Part 2

Systems Analysis & Design Sixth Edition Toolkit Part 2

Toolkit Objectives ● Explain CASE tools and the concept of a CASE environment ● Trace the history of CASE tools and their role in a fourth-generation environment ● Define CASE terms and concepts, including a repository, modeling tools, documentation tools, engineering tools, and construction tools 2

Toolkit Objectives ● Explain an integrated development environment ● Provide examples of CASE tools features ● Describe future trends for CASE tools, including new developments and the emerging role of object-oriented analysis and design 3

Introduction ● Computer-aided systems engineering (CASE), also called computer-aided software engineering, is a technique that uses powerful software, called CASE tools ● You will learn about integrated software development environments 4

Overview of CASE Tools ● CASE tools can reduce costs, speed up development, and provide comprehensive documentation that can be used for future maintenance or enhancements ● CASE Environment ● CASE Tools History – – As early as the 1960 s Forty years ago – procedural languages 5

Overview of CASE Tools ● CASE Tools History – Modern languages – non-procedural or eventdriven – Object-oriented programming languages (OOPL) – Fourth-generation languages (4 GLs) – Fourth-generation environment 6

Overview of CASE Tools ● The Marketplace for CASE Tools – Includes a wide variety of vendors and products, and no one tool dominates the market – The first step in learning about CASE tools is to understand basic CASE terms and concepts 7

CASE Terms and Concepts ● A typical CASE tool is actually a set of individual tools that share a repository of information ● Repository – When you define a data element in the repository, you can assign a data type and format, a range of acceptable values, and one or more aliases – Alias 8

CASE Terms and Concepts ● Individual Tools – Modeling tools – Documentation tools – Engineering tools • Forward engineering • Reverse engineering 9

CASE Terms and Concepts ● Individual Tools – Construction tools • • Application generator – code generator Screen generator Report generator – report writer Mock-up report 10

Integrated Development Environments ● Integrated development environment (IDE) ● Examples of Integrated Development Environments – Oracle Designer – Microsoft’s Visual Studio. NET 11

Integrated Development Environments ● Pros and Cons of Integrated Development Tools – Is highly effective because it is an integral part of the vendor’s software package – The only possible disadvantage is that each IDE is different, and requires a learning curve and skills that might or might not be readily transferable – CASE tools can be used in any development environment 12

CASE Tool Examples ● You can choose from dozens of vendors and CASE tools that offer a wide range of functions ● Three leading CASE tool suppliers: Visible Systems Corporation, Popkin Software, and Rational Software 13

CASE Tool Examples ● Visible Analyst – Visible Systems Corporation is an important player in the software development market – Can generate many types of models and diagrams 14

CASE Tool Examples ● System Architect – Popkin states that its product is the first fully integrated modeling tool to unify the enterprise with complete business and systems information management – Offers numerous diagrams and definitions – Also offers extensive tutorials 15

CASE Tool Examples ● Rational Software – IBM’s Rational Software offers a wide range of systems development and modeling products – Rational Software Architect – Rational Edge 16

Future Trends ● Will consist of cross-platform tools that are capable of working with data and business processes both within the enterprise and from outside customers and suppliers ● Will undoubtedly be planned, constructed, and maintained with a new generation of CASE tools 17

Future Trends ● New Features – Framework Manager – Lines between traditional CASE tools and other modeling tools continue to blur – Microsoft Visio – Another trend is represented by Microsoft’s Visual Studio. NET 18

Future Trends ● The Emerging Role of Object-Oriented Analysis and Design – Structured analysis – Systems development life cycle (SDLC) – Object-oriented analysis and design (OOAD) is gaining popularity – Features of an O-O approach include modular design and reusable code that easily can be combined and reassembled into new components 19

Toolkit Summary ● CASE tools are software programs that system developers use to help them design and construct information systems ● A repository is a database that serves as a central storage location for all information about the system being developed ● An integrated set of CASE tools can be used to model, document, engineer, and construct the information system 20

Toolkit Summary ● Forward engineering means translating business processes and functions into applications ● Two trends seem clear: CASE tool vendors will continue to include powerful new features, and the popularity of object-oriented tools will continue to grow ● Toolkit Part 2 complete 21