TAILIEUCHUNG - Ebook Systems analysis and design (8th edition): Part 2

(BQ) Part 2 book "Systems analysis and design" has contents: Designing effective output, designing effective input, designing databases, human computer interaction, designing accurate data entry procedures, quality assurance and implementation,.and other contents. | C H A P T E R 10 Object-Oriented Systems Analysis and Design Using UML* LEARNING OBJECTIVES Once you have mastered the material in this chapter you will be able to: 1. Understand what object-oriented systems analysis and design is and appreciate its usefulness. 2. Comprehend the concepts of unified modeling language (UML), the standard approach for modeling a system in the object-oriented world. 3. Apply the steps used in UML to break down the system into a use case model and then a class model. 4. Diagram systems with the UML toolset so they can be described and properly designed. 5. Document and communicate the newly modeled object-oriented system to users and other analysts. Object-oriented analysis and design can offer an approach that facilitates logical, rapid, and thorough methods for creating new systems responsive to a changing business landscape. Object-oriented techniques work well in situations in which complicated information systems are undergoing continuous maintenance, adaptation, and redesign. In this chapter, we introduce the unified modeling language (UML), the industry standard for modeling object-oriented systems. The UML toolset includes diagrams that allow you to visualize the construction of an object-oriented system. Each design iteration takes a successively more detailed look at the design of the system until the things and relationships in the system are clearly and precisely defined in UML documents. UML is a powerful tool that can greatly improve the quality of your systems analysis and design, and thereby help create higher-quality information systems. When the object-oriented approach was first introduced, advocates cited reusability of the objects as the main benefit of their approach. It makes intuitive sense that the recycling of program parts should reduce the costs of development in computer-based systems. It has proved to be very effective in the development of GUIs and reusability is the main goal, .

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