软件工程介绍--英文版.ppt

1、Ian Sommerville 2006 Software Engineering, 8th edition. Chapter 1 Slide 1An Introduction to Software EngineeringIan Sommerville 2006 Software Engineering, 8th edition. Chapter 1 Slide 2Objectivesl To introduce software engineering and to explain its importancel To set out the answers to key question

2、s about software engineeringl To introduce ethical and professional issues and to explain why they are of concern to software engineersIan Sommerville 2006 Software Engineering, 8th edition. Chapter 1 Slide 3Topics coveredl FAQs about software engineeringl Professional and ethical responsibilityIan

3、Sommerville 2006 Software Engineering, 8th edition. Chapter 1 Slide 4Software engineeringl The economies of ALL developed nations are dependent on software.l More and more systems are software controlledl Software engineering is concerned with theories, methods and tools for professional software de

4、velopment.l Expenditure on software represents a significant fraction of GNP in all developed countries.Ian Sommerville 2006 Software Engineering, 8th edition. Chapter 1 Slide 5Software costsl Software costs often dominate computer system costs. The costs of software on a PC are often greater than t

5、he hardware cost.l Software costs more to maintain than it does to develop. For systems with a long life, maintenance costs may be several times development costs.l Software engineering is concerned with cost-effective software development.Ian Sommerville 2006 Software Engineering, 8th edition. Chap

6、ter 1 Slide 6FAQs about software engineeringl What is software?l What is software engineering?l What is the difference between software engineering and computer science?l What is the difference between software engineering and system engineering?l What is a software process?l What is a software proc

7、ess model?Ian Sommerville 2006 Software Engineering, 8th edition. Chapter 1 Slide 7FAQs about software engineeringl What are the costs of software engineering?l What are software engineering methods?l What is CASE (Computer-Aided Software Engineering)l What are the attributes of good software?l What

8、 are the key challenges facing software engineering?Ian Sommerville 2006 Software Engineering, 8th edition. Chapter 1 Slide 8What is software?l Computer programs and associated documentation such as requirements, design models and user manuals.l Software products may be developed for a particular cu

9、stomer or may be developed for a general market.l Software products may be Generic - developed to be sold to a range of different customers e.g. PC software such as Excel or Word. Bespoke (custom) - developed for a single customer according to their specification.l New software can be created by dev

10、eloping new programs, configuring generic software systems or reusing existing software.Ian Sommerville 2006 Software Engineering, 8th edition. Chapter 1 Slide 9What is software engineering?l Software engineering is an engineering discipline that is concerned with all aspects of software production.

11、l Software engineers should adopt a systematic and organised approach to their work and use appropriate tools and techniques depending on the problem to be solved, the development constraints and the resources available.Ian Sommerville 2006 Software Engineering, 8th edition. Chapter 1 Slide 10What i

12、s the difference between software engineering and computer science?l Computer science is concerned with theory and fundamentals; software engineering is concerned with the practicalities of developing and delivering useful software.l Computer science theories are still insufficient to act as a complete underpinning for software engineering (unlike e.g. physics and electrical engineering).