SOFTWARE ENGINEERING

Detailed explanation-1: -The most important feature of the model is its ability to manage unknown risks after the project has commenced; creating a prototype makes this feasible.

Detailed explanation-2: -Each round of the spiral constitutes a project, and each round may follow traditional software development methodology such as modified waterfall. A risk analysis is performed each round. Fundamental flaws in the project or process are more likely to be discovered in the earlier phases, resulting in simpler fixes.

Detailed explanation-3: -Spiral model is simply understood as a usage model that maintains a systematic approach and combines an iterative framework which is more reflective to the real world. It also uses prototyping as a risk reduction mechanism and allows prototypes to be developed at any stage of the development process.

Detailed explanation-4: -The spiral model is a risk-driven software development process model. Based on the unique risk patterns of a given project, the spiral model guides a team to adopt elements of one or more process models, such as incremental, waterfall, or evolutionary prototyping.