Information Technology IT – 16 System life cycle | e-Consult

The Waterfall model is a linear, sequential approach to software development. It progresses through distinct phases, each completed before the next begins. These phases typically include:

• Requirements Gathering: Detailed requirements are documented upfront.
• Design: The system architecture and detailed design are created based on the requirements.
• Implementation: The code is written based on the design specifications.
• Testing: The developed software is tested to identify defects.
• Deployment: The software is released to the users.
• Maintenance: Ongoing support and updates are provided.

Strengths of Waterfall:

• Simple and easy to understand: The linear nature makes it straightforward to manage.
• Well-defined stages: Clear milestones and deliverables at each phase.
• Suitable for projects with stable requirements: When requirements are unlikely to change, Waterfall can be efficient.

Weaknesses of Waterfall:

• Inflexible: Difficult and costly to accommodate changes once a phase is complete.
• High risk: Problems identified late in the development cycle can be very expensive to fix.
• Limited user involvement: Users typically only see the final product.
• Not suitable for complex or evolving projects: Where requirements are likely to change, Waterfall is often a poor choice.

In modern software development, Waterfall is less commonly used, particularly for projects with dynamic requirements. Agile methodologies are generally preferred due to their flexibility and ability to adapt to changing needs. However, it can still be appropriate for well-defined, low-risk projects.