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Lecture Software engineering: Chapter 15 – Software Reuse

This lecture presents brief overview of project quality management and key concepts related to project communication management. ISO defines the quality as “the totality of characteristics of an entity that bear on its ability to satisfy stated or implied needs” or “the degree to which a set of inherent characteristics fulfill requirements”. | Chapter 15 – Software Reuse Chapter 15 Software reuse 1 17/11/2014 Topics covered The reuse landscape Application frameworks Software product lines Application system reuse Chapter 15 Software reuse 2 17/11/2014 Software reuse In most engineering disciplines, systems are designed by composing existing components that have been used in other systems. Software engineering has been more focused on original development but it is now recognised that to achieve better software, more quickly and at lower cost, we need a design process that is based on systematic software reuse. There has been a major switch to reuse-based development over the past 10 years. 17/11/2014 Chapter 15 Software reuse 3 Reuse-based software engineering System reuse Complete systems, which may include several application programs may be reused. Application reuse An application may be reused either by incorporating it without change into other or by developing application families. Component reuse Components of an application from sub-systems to single objects may be reused. Object and function reuse Small-scale software components that implement a single well-defined object or function may be reused. 17/11/2014 Chapter 15 Software reuse 4 Benefits of software reuse Benefit Explanation Accelerated development Bringing a system to market as early as possible is often more important than overall development costs. Reusing software can speed up system production because both development and validation time may be reduced. Effective use of specialists Instead of doing the same work over and over again, application specialists can develop reusable software that encapsulates their knowledge. Increased dependability Reused software, which has been tried and tested in working systems, should be more dependable than new software. Its design and implementation faults should have been found and fixed. Chapter 15 Software reuse 5 17/11/2014 5 Benefits of software reuse Benefit Explanation Lower development . | Chapter 15 – Software Reuse Chapter 15 Software reuse 1 17/11/2014 Topics covered The reuse landscape Application frameworks Software product lines Application system reuse Chapter 15 Software reuse 2 17/11/2014 Software reuse In most engineering disciplines, systems are designed by composing existing components that have been used in other systems. Software engineering has been more focused on original development but it is now recognised that to achieve better software, more quickly and at lower cost, we need a design process that is based on systematic software reuse. There has been a major switch to reuse-based development over the past 10 years. 17/11/2014 Chapter 15 Software reuse 3 Reuse-based software engineering System reuse Complete systems, which may include several application programs may be reused. Application reuse An application may be reused either by incorporating it without change into other or by developing application families. Component reuse Components of an .