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How Software is Built: The Software Development Lifecycle (SDLC)
Introduction π
Introduction π
Have you ever wondered how apps like WhatsApp, Instagram, or Netflix are created? π€
Behind every software product is a structured process known as the Software Development Lifecycle (SDLC).
Itβs like a blueprint for building software, ensuring that what developers create is reliable, efficient, and meets user needs.
Have you ever wondered how apps like WhatsApp, Instagram, or Netflix are created? π€
Behind every software product is a structured process known as the Software Development Lifecycle (SDLC).
Itβs like a blueprint for building software, ensuring that what developers create is reliable, efficient, and meets user needs.
What is SDLC? π
What is SDLC? π
The Software Development Lifecycle (SDLC) is a step-by-step process used by software teams to plan, design, build, test, and maintain applications. It reduces risks, saves time, and ensures quality software delivery.
Think of it like constructing a house π‘: you donβt just start laying bricks β you plan, design, build, inspect, and maintain it.
The 7 Stages of SDLC π§©
The 7 Stages of SDLC π§©
1. Planning & Requirement Gathering π
1. Planning & Requirement Gathering π
Understand the goal of the software.
Collect user needs and business requirements.
Example: A bank wants an app for customers to check balances and transfer money.
2. System Design π¨
2. System Design π¨
Architects and developers design the blueprint of the software.
Decide on technology, database, user interface (UI), and security.
Example: Designing how the login screen, database, and security features will work.
3. Development / Coding π»
3. Development / Coding π»
Programmers write the code in languages like Java, Python, C#, or JavaScript.
Teams follow coding standards to ensure maintainability.
Example: Developers code the login function, dashboards, and money transfer system.
4. Testing π§ͺ
4. Testing π§ͺ
The software is checked for bugs and errors.
Types of testing: unit testing, integration testing, user acceptance testing.
Example: Ensuring the money transfer feature works correctly and securely.
5. Deployment π
5. Deployment π
The software is released for users.
Can be a full launch or gradual rollout (beta versions).
Example: The banking app goes live on Play Store / App Store.
6. Maintenance & Updates π§
6. Maintenance & Updates π§
Fixing bugs, improving features, updating for new devices.
Example: Adding fingerprint login to the banking app in a future update.
7. Evaluation & Feedback π
7. Evaluation & Feedback π
Collect feedback from users and stakeholders.
Plan improvements for the next version.
Example: Users suggest adding bill payment options.
SDLC Models ποΈ
SDLC Models ποΈ
Different teams follow different approaches:
Waterfall Model π§ β Linear, step-by-step process.
Agile Model β‘ β Iterative, flexible, with frequent releases.
DevOps π β Focuses on collaboration between development & operations with continuous delivery.
Why SDLC Matters π―
Why SDLC Matters π―
β
Ensures software meets user needs.
β
Improves quality and reliability.
β
Saves time and cost by avoiding rework.
β
Helps teams collaborate effectively.
Conclusion π
Conclusion π
Every app you use goes through the SDLC journey before reaching your hands. From planning to coding, testing, and beyond β SDLC ensures that software is built with purpose, precision, and performance in mind.
Every app you use goes through the SDLC journey before reaching your hands. From planning to coding, testing, and beyond β SDLC ensures that software is built with purpose, precision, and performance in mind.
By understanding SDLC, you get a peek into the science and art of building software β the foundation of our digital world.
By understanding SDLC, you get a peek into the science and art of building software β the foundation of our digital world.
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