What is SDLC?

What is SDLC?

SDLC (Software Development Life Cycle) is a structured process used for developing software applications, ensuring quality, efficiency, and alignment with user requirements. It defines a sequence of stages that software development projects go through from inception to deployment and maintenance.

Phases of SDLC

1. Requirement Gathering and Analysis

• Purpose: Understand and document the software requirements from stakeholders.
• Deliverables:
  • Requirement Specification Document (SRS).
  • Feasibility Study.

2. Planning

• Purpose: Outline the project plan, including timelines, resources, cost estimation, and risk management.
• Deliverables:
  • Project Plan.
  • Budget and resource allocation.

3. Design

• Purpose: Define the system architecture, including UI/UX design, data flow diagrams, and technical specifications.
• Deliverables:
  • High-Level Design (HLD): Overall architecture.
  • Low-Level Design (LLD): Detailed module specifications.

4. Development (Implementation)

• Purpose: Write and compile the code as per the design specifications.
• Activities:
  • Coding using programming languages and frameworks.
  • Unit testing by developers.

5. Testing

• Purpose: Validate the software against requirements to ensure it is bug-free and meets user expectations.
• Activities:
  • Functional testing, Integration testing, System testing, Performance testing, etc.
• Deliverables:
  • Test cases and test reports.
  • Bug tracking and fixes.

6. Deployment

• Purpose: Release the software for use in a live environment.
• Types:
  • Beta Deployment: For user testing in a controlled environment.
  • Full Deployment: For all users.

7. Maintenance

• Purpose: Ensure software continues to operate correctly after deployment by addressing issues, implementing updates, and adding features.
• Activities:
  • Bug fixes.
  • Performance improvements.
  • Adaptation to new requirements.

Models of SDLC

There are various SDLC models, each suited for different project needs:

1. Waterfall Model: Sequential approach; suitable for well-defined requirements.

2. Iterative Model: Develops the system through repeated cycles.

3. Spiral Model: Combines iterative development with risk assessment.

4. V-Model (Validation and Verification): Testing is planned in parallel with development stages.

5. Agile Model: Iterative and incremental; promotes flexibility and continuous feedback

Benefits of SDLC

• Clarity: Provides a structured framework to follow.
• Quality: Ensures thorough testing and validation.
• Cost-Efficiency: Helps identify risks and issues early, reducing development costs.
• Timeliness: Promotes adherence to timelines through defined processes.

In summary, SDLC is crucial for delivering high-quality software that meets user needs while staying within budget and time constraints.