Which software development model is recognized as being less structured compared to others?

The Bazaar software development model is known for its less structured approach compared to more traditional models like Waterfall, Agile, or Spiral. In the Bazaar model, development tends to occur in a more open and collaborative environment, where contributions from a diverse group of developers can be integrated over time. This model focuses on community-driven development, allowing for rapid and flexible changes based on feedback and real-world usage as the project progresses.

This contrasts with the more rigid frameworks of the other models. For instance, the Waterfall model follows a linear and sequential approach where each phase must be completed before moving on to the next. The Spiral model combines elements of design and prototyping in stages but still maintains a level of structure. Agile offers iterative development but typically adheres to defined processes and roles to ensure that projects are completed efficiently. The Bazaar model, however, thrives on an informal and dynamic nature, making it less structured and more adaptable to changes and contributions from various sources.