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Lecture Software engineering: Chapter 7 – Design and Implementation

Chapter 7 – Design and Implementation. In this chapter, the following content will be discussed: Code restructuring, data restructuring; forward engineering; client-server architectures, object-oriented architectures; economics of reengineering; cost benefit analysis; software reuse; benefits of reuse. | Chapter 7 – Design and Implementation Chapter 7 Design and Implementation 1 30/10/2014 Topics covered Object-oriented design using the UML Design patterns Implementation issues Open source development Chapter 7 Design and Implementation 2 30/10/2014 Design and implementation Software design and implementation is the stage in the software engineering process at which an executable software system is developed. Software design and implementation activities are invariably inter-leaved. Software design is a creative activity in which you identify software components and their relationships, based on a customer’s requirements. Implementation is the process of realizing the design as a program. Chapter 7 Design and Implementation 3 30/10/2014 Build or buy In a wide range of domains, it is now possible to buy off-the-shelf systems (COTS) that can be adapted and tailored to the users’ requirements. For example, if you want to implement a medical records system, you can buy a package that is already used in hospitals. It can be cheaper and faster to use this approach rather than developing a system in a conventional programming language. When you develop an application in this way, the design process becomes concerned with how to use the configuration features of that system to deliver the system requirements. Chapter 7 Design and Implementation 4 30/10/2014 Object-oriented design using the UML Chapter 7 Design and Implementation 5 30/10/2014 An object-oriented design process Structured object-oriented design processes involve developing a number of different system models. They require a lot of effort for development and maintenance of these models and, for small systems, this may not be cost-effective. However, for large systems developed by different groups design models are an important communication mechanism. Chapter 7 Design and Implementation 6 30/10/2014 Process stages There are a variety of different object-oriented design processes that depend on the organization | Chapter 7 – Design and Implementation Chapter 7 Design and Implementation 1 30/10/2014 Topics covered Object-oriented design using the UML Design patterns Implementation issues Open source development Chapter 7 Design and Implementation 2 30/10/2014 Design and implementation Software design and implementation is the stage in the software engineering process at which an executable software system is developed. Software design and implementation activities are invariably inter-leaved. Software design is a creative activity in which you identify software components and their relationships, based on a customer’s requirements. Implementation is the process of realizing the design as a program. Chapter 7 Design and Implementation 3 30/10/2014 Build or buy In a wide range of domains, it is now possible to buy off-the-shelf systems (COTS) that can be adapted and tailored to the users’ requirements. For example, if you want to implement a medical records system, you can buy a package that is .