Название: Modern Systems Analysis and Design, 10th edition
Автор: Joseph S Valacich, Joey F. George
Издательство: Pearson
Год: 2025
Страниц: 441
Язык: английский
Формат: True PDF, True EPUB
Размер: 89.6 MB

Modern Systems Analysis and Design is your practical guide to the concepts, skills, methodologies, techniques and tools needed to develop information systems as a systems analyst. Successful completion of an introductory course in computer systems and experience designing programs in at least 1 programming language are a proper foundation for this text. Drawing on the systems development life cycle, the authors provide a conceptual and systematic framework while logically progressing through essential topics and related practice.

The 10th Edition reflects systems development today with updated coverage of agile methodologies, current visuals, figures and tables. Screenshots depict the latest versions of programming and development environments, and user interface designs. Reference lists at the end of each chapter have been updated and collectively offer more than 100 resources, including books, journals and websites current with technological trends in information systems analysis and design.

File and database design occurs in two steps. You begin by developing a logical database model, which describes data using a notation that corresponds to a data organization used by a database management system. This is the system software responsible for storing, retrieving, and protecting data (such as Microsoft Access, Oracle, or SQL Server). The most common style for a logical database model is the relational database model. Once you develop a clear and precise logical database model, you are ready to prescribe the technical specifications for computer files and databases in which to store the data. A physical database design provides these specifications.

You typically do logical and physical database design in parallel with other systems design steps. Thus, you collect the detailed specifications of data necessary for logical database design as you design system inputs and outputs. Logical database design is driven not only from the previously developed E-R data model for the application or enterprise but also from form and report layouts. You study data elements on these system inputs and outputs and identify interrelationships among the data. As with conceptual data modeling, the work of all systems development team members is coordinated and shared through the project dictionary or repository. The designs for logical databases and system inputs and outputs are then used in physical design activities to specify to computer programmers, database administrators, network managers, and others how to implement the new information system. For this text, we assume that the design of computer programs and distributed information processing and data networks are topics of other courses, so we concentrate on the aspect of physical design most often undertaken by a systems analyst—physical file and database design.

With this text, we assume that students have taken an introductory course on computer systems and have experience designing programs in at least one programming language. We review basic system principles for those students who have not been exposed to the material on which systems development methods are based. We also assume that students have a solid background in computing literacy and a general understanding of the core elements of a business, including basic terms associated with the production, marketing, finance, and accounting functions.