In ______ model, software is developed in a series of incremental releases. I.…

I. Spiral Model: Focuses on risk assessment and develops software in increments. It is ideal for large, expensive, and complicated projects.

II. Sequential Model: Also known as the Waterfall Model, this approach follows a linear path where one phase must be completed before the next begins (e.g., Requirements → Design → Implementation). It typically results in one final release at the end of the cycle rather than a series of increments.