Waterfall

Definition

Waterfall is a sequential project management methodology where each phase must be completed before the next one begins. This approach emphasizes a structured and linear progression through stages such as requirements, design, implementation, verification, and maintenance. Its clear-cut nature facilitates straightforward project planning, scheduling, and control, allowing teams to follow a defined path with specific deliverables at each stage.

5 Must Know Facts For Your Next Test

1. Waterfall is best suited for projects with well-defined requirements and minimal expected changes during development.
2. Each phase in the Waterfall model produces specific deliverables that must be approved before moving to the next phase, ensuring clarity and accountability.
3. The methodology typically involves extensive documentation at each stage, which can aid in communication but also increase overhead.
4. Waterfall is often criticized for its rigidity, as any changes in requirements after a phase is complete can lead to significant delays and increased costs.
5. Despite its limitations, Waterfall remains popular in industries where regulatory compliance and thorough documentation are essential, such as construction and manufacturing.

Review Questions

• How does the Waterfall model ensure project deliverables are met at each stage?
  • The Waterfall model requires that each phase be completed and its deliverables approved before the next phase can begin. This structured approach helps maintain focus on specific tasks and responsibilities within each stage, ensuring that nothing is overlooked. By defining clear criteria for success at each point, teams can better manage expectations and ensure quality throughout the project.
• Discuss the advantages and disadvantages of using the Waterfall model compared to more flexible methodologies like Agile.
  • The Waterfall model's advantages include its structured nature and clarity in project scope, which can be beneficial for projects with stable requirements. However, its rigid framework can lead to challenges if requirements change mid-project, potentially causing delays and increased costs. In contrast, Agile offers flexibility and responsiveness to change but may lack the predictability that Waterfall provides, making it more suitable for dynamic environments.
• Evaluate how the Waterfall approach influences project scheduling and control compared to iterative models.
  • The Waterfall approach influences project scheduling by establishing a linear timeline where phases are sequentially dependent on each other. This allows for detailed planning but can also restrict adaptability if changes are needed. In contrast, iterative models like Agile allow for continuous reassessment of schedules based on feedback from ongoing development. This flexibility can enhance control over projects that may face evolving requirements or unforeseen challenges.

Related terms

Agile:

A flexible project management approach that promotes iterative development and collaboration, allowing for rapid changes and continuous feedback.

Gantt Chart:

A visual scheduling tool that represents project tasks along a timeline, helping teams track progress and manage dependencies.

Milestone: Significant points in a project timeline that indicate the completion of a key phase or deliverable.