Agile Model

What is the Agile Model?

The Agile Model breaks the product into small incremental builds delivered through short cycles called sprints (usually 1‑4 weeks). Instead of one large release at the end, working software is delivered continuously, with requirements and solutions evolving through collaboration between self‑organising, cross‑functional teams. Agile embraces change and focuses on delivering value early and often.

Typical Flow of an Agile Sprint

• Requirement Gathering: Requirements are captured as a prioritised backlog of user stories rather than one fixed specification.
• Sprint Planning: The team selects a small set of user stories from the backlog to complete in the upcoming sprint.
• Design & Development: The selected stories are designed and coded within the sprint timebox.
• Testing: Testing happens continuously throughout the sprint, often alongside development, not just at the end.
• Review & Retrospective: The working increment is demoed to stakeholders, feedback is gathered, and the team reflects on the process before the next sprint.

Advantages of the Agile Model

• Working software is delivered frequently, so customers see real progress every sprint.
• Highly adaptive to changing requirements, even late in development.
• Continuous collaboration between developers, testers and customers reduces miscommunication.
• Issues are found and fixed quickly since testing happens within every sprint.

Disadvantages of the Agile Model

• Harder to predict final cost and timeline upfront compared to plan‑driven models.
• Requires close, ongoing customer involvement, which isn't always available.
• Documentation can take a back seat to working software, causing gaps later.
• Needs an experienced, disciplined team to avoid scope creep across sprints.

When Should Testers Use the Agile Model?

• Projects where requirements are expected to change or aren't fully known upfront.
• Products that benefit from frequent releases and fast customer feedback.
• Teams that can commit to close, continuous collaboration with stakeholders.

Understanding when — and when not — to apply the Agile Model helps testers plan the right test strategy and align testing effort with how the project is actually being built.