What are the key differences between agile and waterfall software development methodologies, and when would you recommend using each approach?

Key differences between Agile and Waterfall methodologies

1. Workflow: Waterfall follows a linear, sequential process, while Agile is iterative and incremental.
2. Flexibility: Waterfall is rigid and changes are difficult to incorporate once the project is underway, whereas Agile welcomes changes throughout the development process.
3. Communication: Agile promotes collaboration and communication among team members and stakeholders, while Waterfall may involve less interaction.
4. Deliverables: Waterfall delivers a single, final product at the end of the development cycle, whereas Agile delivers working increments in regular intervals.

Recommendations on when to use each approach

• Waterfall: Use Waterfall when the project requirements are well-defined and unlikely to change, and when there is a fixed budget and timeline.
• Agile: Use Agile when the project scope is evolving, and flexibility and continuous feedback are required. Agile is suitable for projects with uncertain requirements or where the end goal is not clearly defined.

Ultimately, the choice between Agile and Waterfall methodologies depends on the project specifics, team dynamics, client requirements, and the overall project goals.