Is there a problem? Why Hard? Syllabus EXamples AAS(FAA Advanced Automation System) FBI CIC IRS Modernization Program

随着全球软件业的飞速发展,用户对软件的功能和规模等方面都提出了更高的要求。原有的 “软件作坊”的小规模生产已经不能适应社会发 展需求,同时软件工程还是一个复杂的、要素相 互关联的系统性工程。软件开发不同于其他产品的制造,软件开发的整个过程都是设计过程;软 件开发不需要使用大量的物质资源,而主要是人 力资源;并且,软件开发的产品只是程序代码和 技术文件,并没有其他的物质结果

编码阶段的主要任务是把设计阶段所产生的设计结果翻译成计算机能够理解并执行的程序

Software is intangible Hard to understand development effort Software is easy to reproduce Cost is in its development —in other engineering products, manufacturing is the costly stage

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

Software engineers should avoid re-developing software already developed Types of reuse: Reuse of expertise Reuse of standard designs and algorithms

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

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

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

一、软件质量概念 二、软件质量保证 三、软件可靠性 四、软件配置管理