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# System prepended metadata

title: 開發流程

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# 開發流程

## Boehm’s spiral model

**實務上較少使用**


- Phase: 每一圈稱之為Phase
- 維護也能繼續延續Phase

### 主要象限

- Objective setting
    - Specific objectives for the phase are identified. (also include 
    constraints, risks, and alternative strategies)
- Risk assessment and reduction
    - Risks are assessed and activities put in place to reduce the key 
    risks.
- Development and validation
    - A development model for the system is chosen which can be 
    any of the generic models. (..waterfall, prototype, formal method)
- Planning
    - The project is reviewed and the next phase of the spiral is 
    planned.

## Rational Unified Process

work on UML

把三個model好的部分整併後的模型

- 動態
- 靜態
- 實務 (practice)
    - Code Review
    - Unit Test

![Untitled](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/e0ca22e8-0090-40a5-84bb-a589ddf270fd/Untitled.png)

### Phase

- Inception (立案)
Establish the **business case** for the system.
    - 產品價值評估
    - 可行性分析
- Elaboration 
Develop an understanding of the problem domain, establish the 
system architecture, develop project plan, and identify risks
    - 風險評估
    - 研發
    - 系土架構規劃
- Construction
    - System design
    - programming
    - testing.
- Transition
    - Deploy the system in its operating environment. (something 
    ignored in most software process but is, in fact, an expensive 
    and sometimes problematic activity
    - 部署

### Dynamic

![Untitled](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/f1d8e495-6232-4b6f-9582-3894f41b2aa8/Untitled.png)

越早期的活動，會隨時間推進減少活動

在不同階段，仍可做其他階段的事情

### 靜態 工作流

![Untitled](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/d0c7c057-3515-4401-8730-0c1efdd2ec8d/Untitled.png)

以使用者的觀點，系統到要做啥
As a student, I can register an account on school web.

![Untitled](https://s3-us-west-2.amazonaws.com/secure.notion-static.com/2f165c6d-a1a8-4340-b181-788eee3b67db/Untitled.png)

## 好實作

- iteratively
- reusable components.
- 可視化
- 驗證程式品質
    - Code review
- 控制變更



###### tags: 'SE'