The Spiral Development Methodology is a risk-driven software development process that aims to minimize the risk of project failure by iteratively developing and testing the software.

Deployment is not a phase in the Spiral Development Methodology. The four phases of the Spiral Development Methodology are Planning, Risk Analysis, Engineering, and Evaluation.

The Spiral Development Methodology offers several advantages, including early detection and correction of errors, flexibility and adaptability, and suitability for large and complex projects.

The main disadvantage of the Spiral Development Methodology is that it can be time-consuming and expensive, especially for large and complex projects.

Clear and concise requirements are not a key factor in determining the success of a Spiral Development Methodology project. The key factors are strong project management, effective risk management, and regular customer feedback.

Prototyping plays a crucial role in the Spiral Development Methodology by validating the requirements, identifying and mitigating risks, and demonstrating the functionality of the software.

Lack of customer involvement is not a common risk associated with the Spiral Development Methodology. The common risks are scope creep, unrealistic expectations, and technical complexity.

The primary goal of the Planning phase in the Spiral Development Methodology is to define the scope and objectives of the project.

The main purpose of the Risk Analysis phase in the Spiral Development Methodology is to identify and assess the risks associated with the project, develop a risk mitigation plan, and prioritize the risks based on their impact and probability.

The primary focus of the Engineering phase in the Spiral Development Methodology is to develop and test the software, integrate the software components, and conduct user acceptance testing.

The main objective of the Evaluation phase in the Spiral Development Methodology is to obtain customer feedback, assess the quality of the software, and identify areas for improvement.

Lack of customer involvement is not a common challenge faced in the Spiral Development Methodology. The common challenges are managing scope creep, meeting unrealistic expectations, and dealing with technical complexity.

The primary benefit of using the Spiral Development Methodology is that it allows for early detection and correction of errors, is a flexible and adaptable methodology, and is suitable for large and complex projects.

Clear and concise requirements are not a key factor in ensuring the success of a Spiral Development Methodology project. The key factors are strong project management, effective risk management, and regular customer feedback.

The main advantage of using prototyping in the Spiral Development Methodology is that it allows for early validation of requirements, helps in identifying and mitigating risks, and facilitates effective communication between stakeholders.