Procedural paradigm: Software is organized around the notion of procedures Procedural abstraction —Works as long as the data is simple Adding data abstractions —Groups together the pieces of data that describe some entity

The recurring aspects of designs are called design patterns. A pattern is the outline of a reusable solution to a general problem encountered in a particular context Many of them have been systematically documented for all software developersto use

▪ 结构化程序设计 ▪ 程序设计风格 ▪ 程序效率 ▪ 程序复杂性度量

7.1 User Centred Design Software development should focus on the needs of users Understand your users Design software based on an understanding of the users’tasks Ensure users are involved in decision making processes

Project management encompasses all the activities needed to plan and execute a project: Deciding what needs to be done Estimating costs Ensuring there are suitable people to undertake the project

1.交互图(interaction diagram) 交互图 顺序图

一、OOA的基本过程 二、需求陈述 三、建立对象模型 四、建立动态模型 五、建立功能模型 六、定义服务

清华大学：《软件工程》课程教学资源（PPT讲义）课程简介（殷人昆）

清华大学：《软件工程》课程教学资源_教学计划

Reuse (Assume have source code, not a commercial product) Ariane 5. Therac-25. British AtC Expectation Significantly lower development costs and time. Amortize costs among all users or uses Assumptions