What are the phases of a software development lifecycle process model?

The correct answer encompasses the necessary steps in the software development lifecycle (SDLC), correctly capturing the progression from the initial stages of planning through to maintenance.

In a typical SDLC model, the phases often include:

1. Planning and Requirements Analysis: This phase involves understanding what the users need from the software and defining the requirements clearly. It sets the foundation for the entire project.

2. Defining: While not always explicitly labeled as a separate phase, defining generally refers to the detailed documentation of the requirements that were gathered and planned.

3. Designing: After requirements are established, the system architecture and design are laid out, specifying how the software will function and interact with other systems.

4. Developing: This phase covers the actual coding and building of the software based on the designs created.

5. Testing: Once development is complete, the software undergoes rigorous testing to identify and resolve defects or any issues that may affect its performance.

6. Maintenance: This phase involves updating and improving the software post-deployment, ensuring it continues to meet user needs and performance standards over time.

This sequence captures a logical flow where each phase builds on the previous one, leading to a successful software