The Waterfall Model is a traditional software development approach that organises the process into sequential phases. Each phase must be completed before the next begins, creating a structured, step-by-step workflow. This linear methodology emphasises detailed documentation and comprehensive planning.
Key Phases:
- Requirements Gathering: Collecting and documenting all project requirements.
- System Design: Planning the architecture and design of the system.
- Implementation: Developing the system based on the design specifications.
- Verification (Testing): Testing the system to ensure it meets requirements and is free of defects.
- Maintenance: Addressing issues and updating the system after deployment.
Benefits:
- Clear Structure: The sequential nature provides a well-organised project timeline.
- Ease of Management: Each phase has defined objectives, making the process easy to track and manage.
- Comprehensive Documentation: Thorough documentation improves communication and understanding among stakeholders.
- Best for Stable Requirements: Works well for projects where requirements are clear and unlikely to change.
Limitations:
- Inflexibility: The model is not designed to accommodate changes once development begins.
- Risk of Delays: Issues found in later phases can be costly and time-consuming to resolve.
- Limited Feedback: Stakeholders have fewer opportunities to provide input once the process is underway.
The Waterfall model is most effective for projects with well-defined, stable requirements and minimal changes expected during development.