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tags: 軟體工程
title: 第一週
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## Software Crisis
- 1997 software project
- 
- Why have Software Crisis
- Wrong estimates of
- Time
- Effort(完成任務所需人力)
- Cost
- Poor quality
- Easy to crash
- Difficult to maintain
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## Software Engineering

> the establishment and use of sound <font color=red>engineering principles</font> in order to obtain economically software that is reliable and works efficiently on real machines.
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## Software Development Lift Cycle(SDLC)
- 
- Analysis
>The requirement of Software(What?)
> PM 必須出來引導說明客戶需求，以及<font color=red>end-user 是誰</font>，<font color=red>產品的目標與產品應具備哪些功能。</font>此階段要產出 SRS (Software Requirement Specification)文件，顧客應 Review 後，才可進行到下一階段。
- Design
> <font color=red>The blue print of software</font>(How?)
> 依照 SRS 設計 architecture，應該就是系統設計層面，<font color=red>說明前端、後端要使用什麼技術，資料庫設計等等。</font>
- Implementation
> 依照 SRS 與 Design document 進行開發。
- Testing
> 在 SRS 下對於開發的程式進行測試，改善 Bug 達到客戶要求。
- Installation
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## 各階段的設計方法
- Structured Technology
- Structured Analysis
- Structured Design
- Structured Programming
- Objected Oriented Technology
- OOA
- OOD
- OOP
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