What project management model is used in the Scrum methodology?

Incremental and iterative.

• Incremental: The product is developed gradually, adding new functional parts (increments) during each iteration. Each increment is potentially shippable product.
• Iterative: Development occurs in short, fixed-time cycles (iterations, called sprints). At the end of each iteration, the product is evaluated, and the next iteration is planned considering the results and changes in requirements.

This approach allows for flexible response to changes, reduces risks, and provides early feedback during development.