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Software Development Life Cycle (SDLC)

The Software Development Life Cycle (SDLC) is a structured process that outlines the steps for creating and maintaining software. Its main purpose is to provide a clear, standardized roadmap for building high-quality software efficiently, on time, and within budget. The SDLC is not a single methodology but a framework that can be adapted to various approaches, such as Waterfall, Agile, or V-Model.

Typical Phases of the SDLC

While different methodologies have variations, a traditional SDLC typically includes the following phases:

  1. Requirement Gathering and Analysis: The team identifies and documents all the needs and requirements of the software from the customer and stakeholders.
  2. Design: The system architecture and user interface are designed based on the requirements.
  3. Implementation/Development: The actual coding and building of the software takes place.
  4. Testing: The software is tested thoroughly to find and fix any defects. This includes phases like unit testing, integration testing, and system testing.
  5. Deployment: The software is released to the production environment for end-users.
  6. Maintenance: The software is supported, updated, and enhanced based on user feedback and new requirements.

Example: A company wants to create a new mobile application. The SDLC would guide them through the entire process. First, they would gather requirements for features like user registration and a photo-sharing function. Next, they would design the app's layout and database. Then, developers would write the code for each feature. The quality assurance team would test the app to find bugs. Once it passes testing, the app is deployed to app stores. Finally, the team would continue to monitor and update the app based on user reviews and new ideas.