» The Waterfall Model (software)

The Waterfall Model (software)

1970-01-01
  • Winston W. Royce
Software engineering office showcasing the Waterfall Model process phases.

The Waterfall Model is a sequential, non-iterative software development process, where progress flows steadily downwards (like a waterfall) through distinct phases: conception, initiation, analysis, design, construction, testing, deployment and maintenance. Each phase must be fully completed before moving to the next. It is often contrasted with iterative models to highlight their flexibility.

The Waterfall Model represents a traditional, linear approach to project management and 软件 development. Its structure is highly rigid, with a strict sequence of phases. The process begins with a comprehensive requirements gathering and analysis phase, where every detail of the system is documented and approved. Once the requirements are signed off, the system design phase begins, creating the architecture and module specifications. This is followed by implementation (coding), integration and testing, deployment, and finally, a maintenance phase. The defining characteristic is the ‘gate’ between each phase; one phase cannot begin until the previous one is fully complete and its deliverables are approved. This approach was derived from 制造业 and construction industries, where such sequential processes are logical (e.g., you cannot build walls before the foundation is complete). However, in software, this rigidity is often a major drawback. Requirements frequently change, and a flaw discovered during testing may require a costly and difficult return to the design phase. Ironically, Winston W. Royce, who first formally described this model in 1970, presented it as an example of a flawed process, advocating for the addition of iterative feedback loops to improve it.

UNESCO Nomenclature: 1208
– Software

类型

抽象系统

中断

递增

使用方法

小众/专业

前体

  • gantt charts
  • manufacturing process models
  • construction project management methodologies
  • systems engineering principles

应用

  • projects with stable, well-understood requirements
  • simple, small-scale projects
  • systems where safety and security are paramount and design must be locked down early (e.g., some aerospace or medical software)

专利:

NA

潜在的创新想法

级别需要会员

您必须是!!等级!!会员才能访问此内容。

立即加入

已经是会员? 在此登录
Related to: waterfall model, sequential development, software development lifecycle, SDLC, project management, non-iterative, winston royce, requirements analysis, linear model, software engineering.

发表回复

您的邮箱地址不会被公开。 必填项已用 * 标注

迎接新挑战
机械工程师、项目、工艺工程师或研发经理
有效的产品开发

可在短时间内接受新的挑战。
通过 LinkedIn 联系我
塑料金属电子集成、成本设计、GMP、人体工程学、中高容量设备和耗材、精益制造、受监管行业、CE 和 FDA、CAD、Solidworks、精益西格玛黑带、医疗 ISO 13485

我们正在寻找新的赞助商

 

您的公司或机构从事技术、科学或研究吗?
> 给我们发送消息 <

接收所有新文章
免费,无垃圾邮件,电子邮件不分发也不转售

或者您可以免费获得完整会员资格以访问所有受限制的内容>这里<

历史背景

(如果日期不详或不相关,例如 "流体力学",则对其显著出现的时间作了四舍五入的估计)。

相关发明、创新和技术原理

滚动至顶部

你可能还喜欢